diff --git a/docs/WechatTenpayV3/Basic_ModelDefinition.md b/docs/WechatTenpayV3/Basic_ModelDefinition.md
index c7855357..5018fd33 100644
--- a/docs/WechatTenpayV3/Basic_ModelDefinition.md
+++ b/docs/WechatTenpayV3/Basic_ModelDefinition.md
@@ -1358,6 +1358,14 @@
 
         -   视频上传：`UploadMerchantMediaVideo`
 
+    -   修改主体信息
+
+        -   提交申请单：`CreateMerchantAlterApplyMerchantSubjectAlterApplyment`
+
+        -   撤销申请单：`RevokeMerchantAlterApplyMerchantSubjectAlterApplyment`
+
+        -   查询申请单状态：`GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentId` / `GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumber`
+
     -   商户开户意愿确认
 
         -   提交申请单：`CreateApplyForSubjectApplyment`
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/ExtendedSDK/Global/WechatTenpayGlobalClient.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/ExtendedSDK/Global/WechatTenpayGlobalClient.cs
index ab7e95b1..e646fbb5 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/ExtendedSDK/Global/WechatTenpayGlobalClient.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/ExtendedSDK/Global/WechatTenpayGlobalClient.cs
@@ -78,7 +78,7 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.ExtendedSDK.Global
         /// <param name="httpContent"></param>
         /// <param name="cancellationToken"></param>
         /// <returns></returns>
-        public async new Task<T> SendFlurlRequestAsync<T>(IFlurlRequest flurlRequest, HttpContent? httpContent = null, CancellationToken cancellationToken = default)
+        public new async Task<T> SendFlurlRequestAsync<T>(IFlurlRequest flurlRequest, HttpContent? httpContent = null, CancellationToken cancellationToken = default)
             where T : WechatTenpayGlobalResponse, new()
         {
             if (flurlRequest is null) throw new ArgumentNullException(nameof(flurlRequest));
@@ -95,7 +95,7 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.ExtendedSDK.Global
         /// <param name="data"></param>
         /// <param name="cancellationToken"></param>
         /// <returns></returns>
-        public async new Task<T> SendFlurlRequestAsJsonAsync<T>(IFlurlRequest flurlRequest, object? data = null, CancellationToken cancellationToken = default)
+        public new async Task<T> SendFlurlRequestAsJsonAsync<T>(IFlurlRequest flurlRequest, object? data = null, CancellationToken cancellationToken = default)
             where T : WechatTenpayGlobalResponse, new()
         {
             if (flurlRequest is null) throw new ArgumentNullException(nameof(flurlRequest));
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecuteMerchantAlterApplyExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecuteMerchantAlterApplyExtensions.cs
new file mode 100644
index 00000000..81afa7e4
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecuteMerchantAlterApplyExtensions.cs
@@ -0,0 +1,99 @@
+using System;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using Flurl.Http;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
+{
+    public static class WechatTenpayClientExecuteMerchantAlterApplyExtensions
+    {
+        /// <summary>
+        /// <para>异步调用 [POST] /mchalterapply/mchsubjectalterapplyment 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://pay.weixin.qq.com/doc/v3/partner/4014090649 ]]>
+        /// </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.CreateMerchantAlterApplyMerchantSubjectAlterApplymentResponse> ExecuteCreateMerchantAlterApplyMerchantSubjectAlterApplymentAsync(this WechatTenpayClient client, Models.CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateFlurlRequest(request, HttpMethod.Post, "mchalterapply", "mchsubjectalterapplyment");
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.CreateMerchantAlterApplyMerchantSubjectAlterApplymentResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
+
+        /// <summary>
+        /// <para>异步调用 [POST] /mchalterapply/mchsubjectalterapplyment/{apply_id}/revoke 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://pay.weixin.qq.com/doc/v3/partner/4014090672 ]]>
+        /// </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.RevokeMerchantAlterApplyMerchantSubjectAlterApplymentResponse> ExecuteRevokeMerchantAlterApplyMerchantSubjectAlterApplymentAsync(this WechatTenpayClient client, Models.RevokeMerchantAlterApplyMerchantSubjectAlterApplymentRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateFlurlRequest(request, HttpMethod.Post, "mchalterapply", "mchsubjectalterapplyment", request.ApplymentId, "revoke");
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.RevokeMerchantAlterApplyMerchantSubjectAlterApplymentResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
+
+        /// <summary>
+        /// <para>异步调用 [GET] /mchalterapply/mchsubjectalterapplyment/merchant/{merchant_code}/out-request-no/{out_request_no} 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://pay.weixin.qq.com/doc/v3/partner/4014090667 ]]>
+        /// </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse> ExecuteGetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberAsync(this WechatTenpayClient client, Models.GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateFlurlRequest(request, HttpMethod.Get, "mchalterapply", "mchsubjectalterapplyment", "merchant", request.SubMerchantId, "out-request-no", request.OutRequestNumber);
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
+
+        /// <summary>
+        /// <para>异步调用 [GET] /mchalterapply/mchsubjectalterapplyment/{apply_id} 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://pay.weixin.qq.com/doc/v3/partner/4014090655 ]]>
+        /// </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdResponse> ExecuteGetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdAsync(this WechatTenpayClient client, Models.GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            IFlurlRequest flurlReq = client
+                .CreateFlurlRequest(request, HttpMethod.Get, "mchalterapply", "mchsubjectalterapplyment", request.ApplymentId);
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/Apply4SubMerchant/GetApplyForSubMerchantApplymentByBusinessCodeResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/Apply4SubMerchant/GetApplyForSubMerchantApplymentByBusinessCodeResponse.cs
index 08f6b47b..9889eaba 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/Apply4SubMerchant/GetApplyForSubMerchantApplymentByBusinessCodeResponse.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/Apply4SubMerchant/GetApplyForSubMerchantApplymentByBusinessCodeResponse.cs
@@ -1,4 +1,4 @@
-namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
 {
     /// <summary>
     /// <para>表示 [GET] /applyment4sub/applyment/business_code/{business_code} 接口的响应。</para>
@@ -79,6 +79,6 @@
         /// </summary>
         [Newtonsoft.Json.JsonProperty("audit_detail")]
         [System.Text.Json.Serialization.JsonPropertyName("audit_detail")]
-        public Types.AuditDetail[]? AuditList { get; set; }
+        public Types.AuditDetail[]? AuditDetailList { get; set; }
     }
 }
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest.cs
new file mode 100644
index 00000000..59ae0b6c
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest.cs
@@ -0,0 +1,381 @@
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /mchalterapply/mchsubjectalterapplyment 接口的请求。</para>
+    /// </summary>
+    [WechatTenpaySensitive]
+    public class CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest : WechatTenpayRequest
+    {
+        public static class Types
+        {
+            public class BusinessLicense
+            {
+                /// <summary>
+                /// 获取或设置营业执照注册号。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("license_number")]
+                [System.Text.Json.Serialization.JsonPropertyName("license_number")]
+                public string LicenseNumber { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置营业执照照片媒体文件标识 ID。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("license_copy")]
+                [System.Text.Json.Serialization.JsonPropertyName("license_copy")]
+                public string LicenseCopyMediaId { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置营业执照有效期开始日期字符串（格式："yyyy-MM-dd"）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("license_period_begin")]
+                [System.Text.Json.Serialization.JsonPropertyName("license_period_begin")]
+                public string? LicensePeriodBeginDateString { get; set; }
+
+                /// <summary>
+                /// 获取或设置营业执照有效期结束日期字符串（格式："yyyy-MM-dd" / "长期"）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("license_period_end")]
+                [System.Text.Json.Serialization.JsonPropertyName("license_period_end")]
+                public string? LicensePeriodEndDateString { get; set; }
+
+                /// <summary>
+                /// 获取或设置商户名称。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("merchant_name")]
+                [System.Text.Json.Serialization.JsonPropertyName("merchant_name")]
+                public string MerchantName { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置法人姓名。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("legal_person")]
+                [System.Text.Json.Serialization.JsonPropertyName("legal_person")]
+                public string LegalPerson { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置注册地址。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("company_address")]
+                [System.Text.Json.Serialization.JsonPropertyName("company_address")]
+                public string? CompanyAddress { get; set; }
+            }
+
+            public class FinanceInstitutionLicense : CreateApplyForSubjectApplymentRequest.Types.Subject.Types.FinanceInstitutionLicense
+            {
+            }
+
+            public class InstitutionalCertificate
+            {
+                /// <summary>
+                /// 获取或设置证书类型。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("cert_type")]
+                [System.Text.Json.Serialization.JsonPropertyName("cert_type")]
+                public string CertificateType { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置证书编号。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("cert_number")]
+                [System.Text.Json.Serialization.JsonPropertyName("cert_number")]
+                public string CertificateNumber { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置证书照片媒体文件标识 ID。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("cert_copy")]
+                [System.Text.Json.Serialization.JsonPropertyName("cert_copy")]
+                public string CertificateCopyMediaId { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置证书有效期开始日期字符串（格式："yyyy-MM-dd"）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("cert_period_begin")]
+                [System.Text.Json.Serialization.JsonPropertyName("cert_period_begin")]
+                public string? CertificatePeriodBeginDateString { get; set; }
+
+                /// <summary>
+                /// 获取或设置证书有效期结束日期字符串（格式："yyyy-MM-dd" / "长期"）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("cert_period_end")]
+                [System.Text.Json.Serialization.JsonPropertyName("cert_period_end")]
+                public string? CertificatePeriodEndDateString { get; set; }
+
+                /// <summary>
+                /// 获取或设置商户名称。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("merchant_name")]
+                [System.Text.Json.Serialization.JsonPropertyName("merchant_name")]
+                public string MerchantName { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置法人姓名。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("legal_person")]
+                [System.Text.Json.Serialization.JsonPropertyName("legal_person")]
+                public string LegalPerson { get; set; } = string.Empty;
+
+                /// <summary>
+                /// 获取或设置注册地址。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("company_address")]
+                [System.Text.Json.Serialization.JsonPropertyName("company_address")]
+                public string? CompanyAddress { get; set; }
+            }
+
+            public class LegalPerson
+            {
+                /// <summary>
+                /// 获取或设置证件持有人类型。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("id_holder_type")]
+                [System.Text.Json.Serialization.JsonPropertyName("id_holder_type")]
+                public string? IdHolderType { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件类型。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("id_doc_type")]
+                [System.Text.Json.Serialization.JsonPropertyName("id_doc_type")]
+                public string? IdentityType { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件姓名（需使用平台公钥/证书加密）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_name")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_name")]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_RSA_2048_WITH_SHA256, algorithm: Constants.EncryptionAlgorithms.RSA_2048_ECB_PKCS8_OAEP_WITH_SHA1_AND_MGF1)]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_SM2_WITH_SM3, algorithm: Constants.EncryptionAlgorithms.SM2_C1C3C2_ASN1)]
+                public string? IdName { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件号码（需使用平台公钥/证书加密）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_number")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_number")]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_RSA_2048_WITH_SHA256, algorithm: Constants.EncryptionAlgorithms.RSA_2048_ECB_PKCS8_OAEP_WITH_SHA1_AND_MGF1)]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_SM2_WITH_SM3, algorithm: Constants.EncryptionAlgorithms.SM2_C1C3C2_ASN1)]
+                public string? IdNumber { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件地址（需使用平台公钥/证书加密）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_address")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_address")]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_RSA_2048_WITH_SHA256, algorithm: Constants.EncryptionAlgorithms.RSA_2048_ECB_PKCS8_OAEP_WITH_SHA1_AND_MGF1)]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_SM2_WITH_SM3, algorithm: Constants.EncryptionAlgorithms.SM2_C1C3C2_ASN1)]
+                public string? IdAddress { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件有效期开始日期字符串（格式：yyyy-MM-dd）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_period_begin")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_period_begin")]
+                public string? IdPeriodBeginDateString { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件有效期结束日期字符串（格式：yyyy-MM-dd / "长期"）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_period_end")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_period_end")]
+                public string? IdPeriodEndDateString { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件正面照片媒体文件标识 ID。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_front")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_front")]
+                public string? IdFrontCopyMediaId { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件反面照片媒体文件标识 ID。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_back")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_back")]
+                public string? IdBackCopyMediaId { get; set; }
+
+                /// <summary>
+                /// 获取或设置法人代表授权函媒体文件标识。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("authorize_letter_copy")]
+                [System.Text.Json.Serialization.JsonPropertyName("authorize_letter_copy")]
+                public string? AuthorizeLetterCopyMediaId { get; set; }
+
+                /// <summary>
+                /// 获取或设置法人是否为受益人。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("as_ubo")]
+                [System.Text.Json.Serialization.JsonPropertyName("as_ubo")]
+                public bool? AsUBO { get; set; }
+            }
+
+            public class UBO
+            {
+                /// <summary>
+                /// 获取或设置证件类型。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("id_doc_type")]
+                [System.Text.Json.Serialization.JsonPropertyName("id_doc_type")]
+                public string? IdentityType { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件姓名（需使用平台公钥/证书加密）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_name")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_name")]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_RSA_2048_WITH_SHA256, algorithm: Constants.EncryptionAlgorithms.RSA_2048_ECB_PKCS8_OAEP_WITH_SHA1_AND_MGF1)]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_SM2_WITH_SM3, algorithm: Constants.EncryptionAlgorithms.SM2_C1C3C2_ASN1)]
+                public string? IdName { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件号码（需使用平台公钥/证书加密）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_number")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_number")]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_RSA_2048_WITH_SHA256, algorithm: Constants.EncryptionAlgorithms.RSA_2048_ECB_PKCS8_OAEP_WITH_SHA1_AND_MGF1)]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_SM2_WITH_SM3, algorithm: Constants.EncryptionAlgorithms.SM2_C1C3C2_ASN1)]
+                public string? IdNumber { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件地址（需使用平台公钥/证书加密）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_address")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_address")]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_RSA_2048_WITH_SHA256, algorithm: Constants.EncryptionAlgorithms.RSA_2048_ECB_PKCS8_OAEP_WITH_SHA1_AND_MGF1)]
+                [WechatTenpaySensitiveProperty(scheme: Constants.SignSchemes.WECHATPAY2_SM2_WITH_SM3, algorithm: Constants.EncryptionAlgorithms.SM2_C1C3C2_ASN1)]
+                public string? IdAddress { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件有效期开始日期字符串（格式：yyyy-MM-dd）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_period_begin")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_period_begin")]
+                public string? IdPeriodBeginDateString { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件有效期结束日期字符串（格式：yyyy-MM-dd / "长期"）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_period_end")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_period_end")]
+                public string? IdPeriodEndDateString { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件正面照片媒体文件标识 ID。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_front")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_front")]
+                public string? IdFrontCopyMediaId { get; set; }
+
+                /// <summary>
+                /// 获取或设置证件反面照片媒体文件标识 ID。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("card_back")]
+                [System.Text.Json.Serialization.JsonPropertyName("card_back")]
+                public string? IdBackCopyMediaId { get; set; }
+            }
+
+            public class Addition
+            {
+                /// <summary>
+                /// 获取或设置银行开户许可证 MediaId。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("bank_openaccount_license")]
+                [System.Text.Json.Serialization.JsonPropertyName("bank_openaccount_license")]
+                public string? BankOpenAccountLicenseCopyMediaId { get; set; }
+
+                /// <summary>
+                /// 获取或设置开户核准通知书 MediaId。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("openaccount_approval")]
+                [System.Text.Json.Serialization.JsonPropertyName("openaccount_approval")]
+                public string? OpenAccountApprovalCopyMediaId { get; set; }
+
+                /// <summary>
+                /// 获取或设置法人身份辅助证明 MediaId。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("legal_other_prove")]
+                [System.Text.Json.Serialization.JsonPropertyName("legal_other_prove")]
+                public string? LegalPersonOtherProveCopyMediaId { get; set; }
+
+                /// <summary>
+                /// 获取或设置发证机关证明 MediaId。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("agency_prove")]
+                [System.Text.Json.Serialization.JsonPropertyName("agency_prove")]
+                public string? AgencyProveCopyMediaId { get; set; }
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置特约商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("merchant_code")]
+        [System.Text.Json.Serialization.JsonPropertyName("merchant_code")]
+        public string SubMerchantId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置业务申请编号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_request_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_request_no")]
+        public string OutRequestNumber { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置主体类型。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("organization_type")]
+        [System.Text.Json.Serialization.JsonPropertyName("organization_type")]
+        public string SubjectType { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置是否是金融机构。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("finance_institution")]
+        [System.Text.Json.Serialization.JsonPropertyName("finance_institution")]
+        public bool? IsFinanceInstitution { get; set; }
+
+        /// <summary>
+        /// 获取或设置营业执照信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("business_license_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("business_license_info")]
+        public Types.BusinessLicense? BusinessLicense { get; set; }
+
+        /// <summary>
+        /// 获取或设置登记证书信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("certificate_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("certificate_info")]
+        public Types.InstitutionalCertificate? InstitutionalCertificate { get; set; }
+
+        /// <summary>
+        /// 获取或设置金融机构许可证信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("finance_institution_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("finance_institution_info")]
+        public Types.FinanceInstitutionLicense? FinanceInstitutionLicense { get; set; }
+
+        /// <summary>
+        /// 获取或设置法人身份信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("legal_person_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("legal_person_info")]
+        public Types.LegalPerson? LegalPerson { get; set; }
+
+        /// <summary>
+        /// 获取或设置最终受益人列表。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("ubo_info_list")]
+        [System.Text.Json.Serialization.JsonPropertyName("ubo_info_list")]
+        public IList<Types.UBO>? UBOList { get; set; }
+
+        /// <summary>
+        /// 获取或设置补充材料信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("addition")]
+        [System.Text.Json.Serialization.JsonPropertyName("addition")]
+        public Types.Addition? Addition { get; set; }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentResponse.cs
new file mode 100644
index 00000000..d5ea1774
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentResponse.cs
@@ -0,0 +1,15 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /mchalterapply/mchsubjectalterapplyment 接口的响应。</para>
+    /// </summary>
+    public class CreateMerchantAlterApplyMerchantSubjectAlterApplymentResponse : WechatTenpayResponse
+    {
+        /// <summary>
+        /// 获取或设置申请单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("apply_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("apply_id")]
+        public string ApplymentId { get; set; } = default!;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdRequest.cs
new file mode 100644
index 00000000..c4643f8c
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdRequest.cs
@@ -0,0 +1,15 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /mchalterapply/mchsubjectalterapplyment/{apply_id} 接口的请求。</para>
+    /// </summary>
+    public class GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdRequest : WechatTenpayRequest
+    {
+        /// <summary>
+        /// 获取或设置申请单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string ApplymentId { get; set; } = string.Empty;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdResponse.cs
new file mode 100644
index 00000000..d133e6ec
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdResponse.cs
@@ -0,0 +1,9 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /mchalterapply/mchsubjectalterapplyment/{apply_id} 接口的响应。</para>
+    /// </summary>
+    public class GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdResponse : GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse
+    {
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberRequest.cs
new file mode 100644
index 00000000..63264937
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberRequest.cs
@@ -0,0 +1,22 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /mchalterapply/mchsubjectalterapplyment/merchant/{merchant_code}/out-request-no/{out_request_no} 接口的请求。</para>
+    /// </summary>
+    public class GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberRequest : WechatTenpayRequest
+    {
+        /// <summary>
+        /// 获取或设置特约商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string SubMerchantId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置业务申请编号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string OutRequestNumber { get; set; } = string.Empty;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse.cs
new file mode 100644
index 00000000..e9ec0c46
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse.cs
@@ -0,0 +1,70 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [GET] /mchalterapply/mchsubjectalterapplyment/merchant/{merchant_code}/out-request-no/{out_request_no} 接口的响应。</para>
+    /// </summary>
+    public class GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse : WechatTenpayResponse
+    {
+        public static class Types
+        {
+            public class AuditRejectDetail
+            {
+                /// <summary>
+                /// 获取或设置参数名称。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("param_name")]
+                [System.Text.Json.Serialization.JsonPropertyName("param_name")]
+                public string ParameterName { get; set; } = default!;
+
+                /// <summary>
+                /// 获取或设置驳回原因。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("reject_reason")]
+                [System.Text.Json.Serialization.JsonPropertyName("reject_reason")]
+                public string RejectReason { get; set; } = default!;
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置特约商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("merchant_code")]
+        [System.Text.Json.Serialization.JsonPropertyName("merchant_code")]
+        public string SubMerchantId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置业务申请编号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_request_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_request_no")]
+        public string OutRequestNumber { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置申请单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("apply_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("apply_id")]
+        public string ApplymentId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置申请单状态。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("state")]
+        [System.Text.Json.Serialization.JsonPropertyName("state")]
+        public string ApplymentState { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置驳回原因。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("audit_reject_reason")]
+        [System.Text.Json.Serialization.JsonPropertyName("audit_reject_reason")]
+        public string? AuditRejectReason { get; set; }
+
+        /// <summary>
+        /// 获取或设置驳回原因详情列表。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("audit_reject_detail")]
+        [System.Text.Json.Serialization.JsonPropertyName("audit_reject_detail")]
+        public Types.AuditRejectDetail[]? AuditRejectDetailList { get; set; }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/RevokeMerchantAlterApplyMerchantSubjectAlterApplymentRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/RevokeMerchantAlterApplyMerchantSubjectAlterApplymentRequest.cs
new file mode 100644
index 00000000..2130f881
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/RevokeMerchantAlterApplyMerchantSubjectAlterApplymentRequest.cs
@@ -0,0 +1,15 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /mchalterapply/mchsubjectalterapplyment/{apply_id}/revoke 接口的请求。</para>
+    /// </summary>
+    public class RevokeMerchantAlterApplyMerchantSubjectAlterApplymentRequest : WechatTenpayRequest
+    {
+        /// <summary>
+        /// 获取或设置申请单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonIgnore]
+        [System.Text.Json.Serialization.JsonIgnore]
+        public string ApplymentId { get; set; } = string.Empty;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/RevokeMerchantAlterApplyMerchantSubjectAlterApplymentResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/RevokeMerchantAlterApplyMerchantSubjectAlterApplymentResponse.cs
new file mode 100644
index 00000000..247e33cc
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/MerchantAlterApply/RevokeMerchantAlterApplyMerchantSubjectAlterApplymentResponse.cs
@@ -0,0 +1,15 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /mchalterapply/mchsubjectalterapplyment/{apply_id}/revoke 接口的响应。</para>
+    /// </summary>
+    public class RevokeMerchantAlterApplyMerchantSubjectAlterApplymentResponse : WechatTenpayResponse
+    {
+        /// <summary>
+        /// 获取或设置撤销状态。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("result")]
+        [System.Text.Json.Serialization.JsonPropertyName("result")]
+        public string Result { get; set; } = default!;
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest.json
new file mode 100644
index 00000000..d763893a
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest.json
@@ -0,0 +1,57 @@
+{
+    "business_license_info": {
+        "company_address": "广东省深圳市南山区xx路xx号",
+        "legal_person": "李四",
+        "license_copy": "0P3ng6KTIW4-Q_l2FjKLZuhHjBWoMAjmVtCz7ScmhEIThCaV-4BBgVwtNkCHO_XXqK5dE5YdOmFJBZR9FwczhJehHhAZN6BKXQPcs-VvdSo",
+        "license_number": "914201123033363296",
+        "license_period_begin": "2019-06-06",
+        "license_period_end": "2026-06-06",
+        "merchant_name": "李四网络有限公司"
+    },
+    "certificate_info": {
+        "cert_copy": "0P3ng6KTIW4-Q_l2FjKLZuhHjBWoMAjmVtCz7ScmhEIThCaV-4BBgVwtNkCHO_XXqK5dE5YdOmFJBZR9FwczhJehHhAZN6BKXQPcs-VvdSo",
+        "cert_number": "111111111111",
+        "cert_period_begin": "2019-06-06",
+        "cert_period_end": "2026-06-06",
+        "cert_type": "CERTIFICATE_TYPE_2388",
+        "company_address": "广东省深圳市南山区xx路xx号",
+        "legal_person": "李四",
+        "merchant_name": "xx公益团体"
+    },
+    "finance_institution": true,
+    "finance_institution_info": {
+        "finance_license_pics": [
+            "0P3ng6KTIW4-Q_l2FjmFJBZR9FwczhJehHhAZN6BKXQPcs-VvdSo",
+            "0P3ng6KTIW4-Q_l2FjmFJBZR9FwczhJehHhAZN6BKXQPcs-VvdSo"
+        ],
+        "finance_type": "FINANCE_TYPE_BANK_AGENT"
+    },
+    "legal_person_info": {
+        "as_ubo": true,
+        "authorize_letter_copy": "47ZC6GC-vnrbEny_Ie_An5-tCpqxucuxi-vByf3Gjm7KEIUv0OF4wFNIO4kqg05InE4d2I6_H7I4",
+        "card_address": "pVd1HJ6zyvPedzGaV+X3qtmrq9bb9tPROvwia4ibL+F6mfjbzQIzfb3HHLEjZ4YiR/cJiCrZxnAqi+pjeKIEdkwzXRAI7FUhrfPK3SNjaBTEu9GmsugMIA9r3x887Q+ODuC8HH2nzAn7NGpE/e3yiHgWhk0ps5k5DP/2qIdGdONoDzZelrxCl/NWWNUyB93K9F+jC1JX2IMttdY+aQ6zBlw0xnOiNW6Hzy7UtC+xriudjD5APomty7/mYNxLMpRSvWKIjOv/69bDnuC4EL5Kz4jBHLiCyOb+tI0m2qhZ9evAM+Jv1z0NVa8MRtelw/wDa4SzfeespQO/0kjiwfqdfg==",
+        "card_back": "0P3ng6KTIW4-Q_l2FjKLZuhHjBWoMAjmVtCz7ScmhEIThCaV-4BBgVwtNkCHO_XXqK5dE5YdOmFJBZR9FwczhJehHhAZN6BKXQPcs-VvdSo",
+        "card_front": "0P3ng6KTIW4-Q_l2FjKLZuhHjBWoMAjmVtCz7ScmhEIThCaV-4BBgVwtNkCHO_XXqK5dE5YdOmFJBZR9FwczhJehHhAZN6BKXQPcs-VvdSo",
+        "card_name": "MZnwEx6zotwIz6ctW2/iQL5z94odwP9sKiF74RPCPztcJOScaXsaGs82HJNU3K+46ndk7pMrENiPDw==",
+        "card_number": "MZnwEx6zotwIz6ctW2/iQL5z94odwP9sKiF74RPCPztcJOScaXsaGs82HJNU3K+46ndk7pMrENiPDw==",
+        "card_period_begin": "2019-06-06",
+        "card_period_end": "2026-06-06",
+        "id_doc_type": "IDENTIFICATION_TYPE_IDCARD",
+        "id_holder_type": "LEGAL"
+    },
+    "merchant_code": "2492185251",
+    "organization_type": "SUBJECT_TYPE_ENTERPRISE",
+    "out_request_no": "1900013511_10000",
+    "ubo_info_list": [
+        {
+            "card_address": "pVd1HJ6zyvPedzGaV+X3qtmrq9bb9tPROvwia4ibL+F6mfjbzQIzfb3HHLEjZ4YiR/cJiCrZxnAqi+pjeKIEdkwzXRAI7FUhrfPK3SNjaBTEu9GmsugMIA9r3x887Q+ODuC8HH2nzAn7NGpE/e3yiHgWhk0ps5k5DP/2qIdGdONoDzZelrxCl/NWWNUyB93K9F+jC1JX2IMttdY+aQ6zBlw0xnOiNW6Hzy7UtC+xriudjD5APomty7/mYNxLMpRSvWKIjOv/69bDnuC4EL5Kz4jBHLiCyOb+tI0m2qhZ9evAM+Jv1z0NVa8MRtelw/wDa4SzfeespQO/0kjiwfqdfg==",
+            "card_back": "0P3ng6KTIW4-Q_l2FjKLZuhHjBWoMAjmVtCz7ScmhEIThCaV-4BBgVwtNkCHO_XXqK5dE5YdOmFJBZR9FwczhJehHhAZN6BKXQPcs-VvdSo",
+            "card_front": "0P3ng6KTIW4-Q_l2FjKLZuhHjBWoMAjmVtCz7ScmhEIThCaV-4BBgVwtNkCHO_XXqK5dE5YdOmFJBZR9FwczhJehHhAZN6BKXQPcs-VvdSo",
+            "card_name": "MZnwEx6zotwIz6ctW2/iQL5z94odwP9sKiF74RPCPztcJOScaXsaGs82HJNU3K+46ndk7pMrENiPDw==",
+            "card_number": "MZnwEx6zotwIz6ctW2/iQL5z94odwP9sKiF74RPCPztcJOScaXsaGs82HJNU3K+46ndk7pMrENiPDw==",
+            "card_period_begin": "2019-06-06",
+            "card_period_end": "2026-06-06",
+            "id_doc_type": "IDENTIFICATION_TYPE_IDCARD"
+        }
+    ]
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentResponse.json
new file mode 100644
index 00000000..cf644311
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/CreateMerchantAlterApplyMerchantSubjectAlterApplymentResponse.json
@@ -0,0 +1,3 @@
+{
+    "apply_id": "20220617143306000013906025001"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdResponse.json
new file mode 100644
index 00000000..01109729
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByApplymentIdResponse.json
@@ -0,0 +1,13 @@
+{
+    "apply_id": "20220617143306000013906025001",
+    "audit_reject_detail": [
+        {
+            "param_name": "ubo_info_list.card_number_0",
+            "reject_reason": "身份证背面识别失败，请上传更清晰的身份证图片。"
+        }
+    ],
+    "audit_reject_reason": "身份证背面识别失败，请上传更清晰的身份证图片。",
+    "merchant_code": "1900006491",
+    "out_request_no": "1900013511_10000",
+    "state": "APPLYMENT_STATE_EDITTING"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse.json
new file mode 100644
index 00000000..01109729
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/GetMerchantAlterApplyMerchantSubjectAlterApplymentByOutRequestNumberResponse.json
@@ -0,0 +1,13 @@
+{
+    "apply_id": "20220617143306000013906025001",
+    "audit_reject_detail": [
+        {
+            "param_name": "ubo_info_list.card_number_0",
+            "reject_reason": "身份证背面识别失败，请上传更清晰的身份证图片。"
+        }
+    ],
+    "audit_reject_reason": "身份证背面识别失败，请上传更清晰的身份证图片。",
+    "merchant_code": "1900006491",
+    "out_request_no": "1900013511_10000",
+    "state": "APPLYMENT_STATE_EDITTING"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/RevokeMerchantAlterApplyMerchantSubjectAlterApplymentResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/RevokeMerchantAlterApplyMerchantSubjectAlterApplymentResponse.json
new file mode 100644
index 00000000..1f0cb622
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/MerchantAlterApply/RevokeMerchantAlterApplyMerchantSubjectAlterApplymentResponse.json
@@ -0,0 +1,3 @@
+{
+    "result": "SUCCESS"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/TestCase_RequestEncryptionTests.cs b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/TestCase_RequestEncryptionTests.cs
index 47fa7850..0b601a6c 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/TestCase_RequestEncryptionTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/TestCase_RequestEncryptionTests.cs
@@ -1035,6 +1035,83 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests
             }
         }
 
+        [Fact(DisplayName = "测试用例：加密请求中的敏感数据（[POST] /mchalterapply/mchsubjectalterapplyment）")]
+        public async Task TestEncryptRequestSensitiveProperty_CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest()
+        {
+            static Models.CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest GenerateMockRequestModel()
+            {
+                return new Models.CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest()
+                {
+                    LegalPerson = new Models.CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest.Types.LegalPerson()
+                    {
+                        IdName = MOCK_PLAIN_STR,
+                        IdNumber = MOCK_PLAIN_STR,
+                        IdAddress = MOCK_PLAIN_STR
+                    },
+                    UBOList = new List<Models.CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest.Types.UBO>()
+                    {
+                        new Models.CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest.Types.UBO()
+                        {
+                            IdName = MOCK_PLAIN_STR,
+                            IdNumber = MOCK_PLAIN_STR,
+                            IdAddress = MOCK_PLAIN_STR
+                        }
+                    }
+                };
+            }
+
+            static void AssertMockRequestModel(Models.CreateMerchantAlterApplyMerchantSubjectAlterApplymentRequest request, Func<string, string> decryptor)
+            {
+                Assert.NotEqual(MOCK_PLAIN_STR, request.LegalPerson!.IdName!);
+                Assert.NotEqual(MOCK_PLAIN_STR, request.LegalPerson!.IdNumber!);
+                Assert.NotEqual(MOCK_PLAIN_STR, request.LegalPerson!.IdAddress!);
+                Assert.NotEqual(MOCK_PLAIN_STR, request.UBOList![0].IdName!);
+                Assert.NotEqual(MOCK_PLAIN_STR, request.UBOList![0].IdNumber!);
+                Assert.NotEqual(MOCK_PLAIN_STR, request.UBOList![0].IdAddress!);
+                Assert.Equal(MOCK_PLAIN_STR, decryptor.Invoke(request.LegalPerson!.IdName!));
+                Assert.Equal(MOCK_PLAIN_STR, decryptor.Invoke(request.LegalPerson!.IdNumber!));
+                Assert.Equal(MOCK_PLAIN_STR, decryptor.Invoke(request.LegalPerson!.IdAddress!));
+                Assert.Equal(MOCK_PLAIN_STR, decryptor.Invoke(request.UBOList![0].IdName!));
+                Assert.Equal(MOCK_PLAIN_STR, decryptor.Invoke(request.UBOList![0].IdNumber!));
+                Assert.Equal(MOCK_PLAIN_STR, decryptor.Invoke(request.UBOList![0].IdAddress!));
+                Assert.Equal(MOCK_CERT_SN, request.WechatpaySerialNumber!, ignoreCase: true);
+            }
+
+            if (!string.IsNullOrEmpty(TestConfigs.WechatMerchantRSACertificatePrivateKey))
+            {
+                using (var client = CreateMockClientUseRSA(autoEncrypt: false))
+                {
+                    var request = GenerateMockRequestModel();
+                    client.EncryptRequestSensitiveProperty(request);
+                    AssertMockRequestModel(request, (cipher) => Utilities.RSAUtility.DecryptWithECB(RSA_PEM_PRIVATE_KEY, (EncodedString)cipher)!);
+                }
+
+                using (var client = CreateMockClientUseRSA(autoEncrypt: true))
+                {
+                    var request = GenerateMockRequestModel();
+                    await client.ExecuteCreateMerchantAlterApplyMerchantSubjectAlterApplymentAsync(request);
+                    AssertMockRequestModel(request, (cipher) => Utilities.RSAUtility.DecryptWithECB(RSA_PEM_PRIVATE_KEY, (EncodedString)cipher)!);
+                }
+            }
+
+            if (!string.IsNullOrEmpty(TestConfigs.WechatMerchantSM2CertificatePrivateKey))
+            {
+                using (var client = CreateMockClientUseSM2(autoEncrypt: false))
+                {
+                    var request = GenerateMockRequestModel();
+                    client.EncryptRequestSensitiveProperty(request);
+                    AssertMockRequestModel(request, (cipher) => Utilities.SM2Utility.Decrypt(SM2_PEM_PRIVATE_KEY, (EncodedString)cipher)!);
+                }
+
+                using (var client = CreateMockClientUseSM2(autoEncrypt: true))
+                {
+                    var request = GenerateMockRequestModel();
+                    await client.ExecuteCreateMerchantAlterApplyMerchantSubjectAlterApplymentAsync(request);
+                    AssertMockRequestModel(request, (cipher) => Utilities.SM2Utility.Decrypt(SM2_PEM_PRIVATE_KEY, (EncodedString)cipher)!);
+                }
+            }
+        }
+
         [Fact(DisplayName = "测试用例：加密请求中的敏感数据（[POST] /merchant-risk-manage/report-trade-union-information）")]
         public async Task TestEncryptRequestSensitiveProperty_CreateMerchantRiskManageTradeUnionInformationReportRequest()
         {