diff --git a/docs/WechatTenpayV3/Basic_ModelDefinition.md b/docs/WechatTenpayV3/Basic_ModelDefinition.md
index a23934bd..617d180f 100644
--- a/docs/WechatTenpayV3/Basic_ModelDefinition.md
+++ b/docs/WechatTenpayV3/Basic_ModelDefinition.md
@@ -37,7 +37,7 @@
 |  √  |         支付产品：H5 支付         | 直连商户 & 合作伙伴 |                   |
 |  √  |       支付产品：Native 支付       | 直连商户 & 合作伙伴 |                   |
 |  √  |       支付产品：小程序支付        | 直连商户 & 合作伙伴 |                   |
-|  ×  |  <del>支付产品：付款码支付</del>  | 直连商户 & 合作伙伴 | 官方未提供 v3 API |
+|  √  |       支付产品：付款码支付        | 直连商户 & 合作伙伴 |                   |
 |  √  |        支付产品：合单支付         | 直连商户 & 合作伙伴 |                   |
 |  √  |      支付产品：资金/交易账单      | 直连商户 & 合作伙伴 |                   |
 |  √  |          支付产品：退款           | 直连商户 & 合作伙伴 |                   |
@@ -144,6 +144,12 @@
 
         -   关闭订单：`ClosePayTransaction`
 
+    -   付款码支付
+
+        -   付款码支付：`CreatePayTransactionCodePay`
+
+        -   撤销订单：`ReversePayTransaction`
+
     -   合单支付
 
         -   合单 APP 下单：`CreateCombineTransactionApp`
@@ -618,6 +624,12 @@
 
         -   关闭订单：`ClosePayPartnerTransaction`
 
+    -   付款码支付
+
+        -   付款码支付：`CreatePayPartnerTransactionCodePay`
+
+        -   撤销订单：`ReversePayPartnerTransaction`
+
     -   合单支付
 
         -   合单 APP 下单：`CreateCombineTransactionApp`
@@ -1378,7 +1390,7 @@
 
 ---
 
-### 【附】境外开发 API 模型命名速查表：
+### 【附】境外支付 API 模型命名速查表：
 
 注：树形结构与[微信支付开发者文档](https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/pages/Overview.shtml)目录结构保持一致。
 
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayPartnerTransactionsExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayPartnerTransactionsExtensions.cs
index b556e1bb..43bd2c32 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayPartnerTransactionsExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayPartnerTransactionsExtensions.cs
@@ -115,6 +115,31 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
             return await client.SendFlurlRequestAsJsonAsync<Models.CreatePayPartnerTransactionNativeResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
         }
 
+        /// <summary>
+        /// <para>异步调用 [POST] /pay/partner/transactions/codepay 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://pay.weixin.qq.com/docs/partner/apis/partner-code-payment-v3/partner/partner-code-pay.html ]]>
+        /// </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.CreatePayPartnerTransactionCodePayResponse> ExecuteCreatePayPartnerTransactionCodePayAsync(this WechatTenpayClient client, Models.CreatePayPartnerTransactionCodePayRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId is null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateFlurlRequest(request, HttpMethod.Post, "pay", "partner", "transactions", "codepay");
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.CreatePayPartnerTransactionCodePayResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
+
         /// <summary>
         /// <para>异步调用 [POST] /pay/partner/transactions/scannedpos 接口。</para>
         /// <para>
@@ -233,5 +258,30 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
 
             return await client.SendFlurlRequestAsJsonAsync<Models.ClosePayPartnerTransactionResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
         }
+
+        /// <summary>
+        /// <para>异步调用 [POST] /pay/partner/transactions/out-trade-no/{out_trade_no}/reverse 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://pay.weixin.qq.com/docs/partner/apis/partner-code-payment-v3/partner/partner-reverse.html ]]>
+        /// </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.ReversePayPartnerTransactionResponse> ExecuteReversePayPartnerTransactionAsync(this WechatTenpayClient client, Models.ReversePayPartnerTransactionRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId is null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateFlurlRequest(request, HttpMethod.Post, "pay", "partner", "transactions", "out-trade-no", request.OutTradeNumber, "reverse");
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.ReversePayPartnerTransactionResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
     }
 }
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayTransactionsExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayTransactionsExtensions.cs
index 10565098..d75daf52 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayTransactionsExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientExecutePayTransactionsExtensions.cs
@@ -110,6 +110,31 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
             return await client.SendFlurlRequestAsJsonAsync<Models.CreatePayTransactionNativeResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
         }
 
+        /// <summary>
+        /// <para>异步调用 [POST] /pay/transactions/codepay 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://pay.weixin.qq.com/docs/merchant/apis/code-payment-v3/direct/code-pay.html ]]>
+        /// </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.CreatePayTransactionCodePayResponse> ExecuteCreatePayTransactionCodePayAsync(this WechatTenpayClient client, Models.CreatePayTransactionCodePayRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId is null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateFlurlRequest(request, HttpMethod.Post, "pay", "transactions", "codepay");
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.CreatePayTransactionCodePayResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
+
         /// <summary>
         /// <para>异步调用 [GET] /pay/transactions/out-trade-no/{out_trade_no} 接口。</para>
         /// <para>
@@ -198,5 +223,30 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
 
             return await client.SendFlurlRequestAsJsonAsync<Models.ClosePayTransactionResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
         }
+
+        /// <summary>
+        /// <para>异步调用 [POST] /pay/transactions/out-trade-no/{out_trade_no}/reverse 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://pay.weixin.qq.com/docs/merchant/apis/code-payment-v3/direct/reverse.html ]]>
+        /// </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.ReversePayTransactionResponse> ExecuteReversePayTransactionAsync(this WechatTenpayClient client, Models.ReversePayTransactionRequest request, CancellationToken cancellationToken = default)
+        {
+            if (client is null) throw new ArgumentNullException(nameof(client));
+            if (request is null) throw new ArgumentNullException(nameof(request));
+
+            if (request.MerchantId is null)
+                request.MerchantId = client.Credentials.MerchantId;
+
+            IFlurlRequest flurlReq = client
+                .CreateFlurlRequest(request, HttpMethod.Post, "pay", "transactions", "out-trade-no", request.OutTradeNumber, "reverse");
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.ReversePayTransactionResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
     }
 }
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionAppRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionAppRequest.cs
index 533427fc..d5696536 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionAppRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionAppRequest.cs
@@ -141,7 +141,7 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
                 /// </summary>
                 [Newtonsoft.Json.JsonProperty("payer_client_ip")]
                 [System.Text.Json.Serialization.JsonPropertyName("payer_client_ip")]
-                public string ClientIp { get; set; } = string.Empty;
+                public string? ClientIp { get; set; }
 
                 /// <summary>
                 /// 获取或设置商户端设备号。
@@ -150,6 +150,13 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
                 [System.Text.Json.Serialization.JsonPropertyName("device_id")]
                 public string? DeviceId { get; set; }
 
+                /// <summary>
+                /// 获取或设置商户端设备 IP。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("device_ip")]
+                [System.Text.Json.Serialization.JsonPropertyName("device_ip")]
+                public string? DeviceIp { get; set; }
+
                 /// <summary>
                 /// 获取或设置商户门店信息。
                 /// </summary>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionCodePayRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionCodePayRequest.cs
new file mode 100644
index 00000000..51d7775d
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionCodePayRequest.cs
@@ -0,0 +1,190 @@
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /pay/transactions/codepay 接口的请求。</para>
+    /// </summary>
+    public class CreatePayTransactionCodePayRequest : WechatTenpayRequest
+    {
+        public static class Types
+        {
+            public class Payer
+            {
+                /// <summary>
+                /// 获取或设置授权码。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("auth_code")]
+                [System.Text.Json.Serialization.JsonPropertyName("auth_code")]
+                public string AuthCode { get; set; } = string.Empty;
+            }
+
+            public class Amount : CreatePayTransactionAppRequest.Types.Amount
+            {
+            }
+
+            public class Detail
+            {
+                public static class Types
+                {
+                    public class GoodsDetail
+                    {
+                        /// <summary>
+                        /// 获取或设置商户侧商品编码。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("merchant_goods_id")]
+                        [System.Text.Json.Serialization.JsonPropertyName("merchant_goods_id")]
+                        public string MerchantGoodsId { get; set; } = string.Empty;
+
+                        /// <summary>
+                        /// 获取或设置微信侧商品编码。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("wxpay_goods_id")]
+                        [System.Text.Json.Serialization.JsonPropertyName("wxpay_goods_id")]
+                        public string? WechatpayGoodsId { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置商品名称。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("goods_name")]
+                        [System.Text.Json.Serialization.JsonPropertyName("goods_name")]
+                        public string? GoodsName { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置商品数量。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("quantity")]
+                        [System.Text.Json.Serialization.JsonPropertyName("quantity")]
+                        public int Quantity { get; set; }
+
+                        /// <summary>
+                        /// 获取或设置商品单价（单位：分）。
+                        /// </summary>
+                        [Newtonsoft.Json.JsonProperty("unit_price")]
+                        [System.Text.Json.Serialization.JsonPropertyName("unit_price")]
+                        public int UnitPrice { get; set; }
+                    }
+                }
+
+                /// <summary>
+                /// 获取或设置订单原价（单位：分）。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("cost_price")]
+                [System.Text.Json.Serialization.JsonPropertyName("cost_price")]
+                public int? CostPrice { get; set; }
+
+                /// <summary>
+                /// 获取或设置商品小票 ID。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("invoice_id")]
+                [System.Text.Json.Serialization.JsonPropertyName("invoice_id")]
+                public string? InvoiceId { get; set; }
+
+                /// <summary>
+                /// 获取或设置单品列表。
+                /// </summary>
+                [Newtonsoft.Json.JsonProperty("goods_detail")]
+                [System.Text.Json.Serialization.JsonPropertyName("goods_detail")]
+                public List<Types.GoodsDetail>? GoodsList { get; set; }
+            }
+
+            public class Scene : CreatePayTransactionAppRequest.Types.Scene
+            {
+                public static new class Types
+                {
+                    public class Store : CreatePayTransactionAppRequest.Types.Scene.Types.Store
+                    {
+                    }
+                }
+            }
+
+            public class Settlement : CreatePayTransactionAppRequest.Types.Settlement
+            {
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置微信商户号。如果不指定将使用构造 <see cref="WechatTenpayClient"/> 时的 <see cref="WechatTenpayClientOptions.MerchantId"/> 参数。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("mchid")]
+        public string? MerchantId { get; set; }
+
+        /// <summary>
+        /// 获取或设置微信 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("appid")]
+        public string? AppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置商品描述。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("description")]
+        [System.Text.Json.Serialization.JsonPropertyName("description")]
+        public string Description { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置商户订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string OutTradeNumber { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置附加数据。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("attach")]
+        [System.Text.Json.Serialization.JsonPropertyName("attach")]
+        public string? Attachment { get; set; }
+
+        /// <summary>
+        /// 获取或设置订单优惠标记。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("goods_tag")]
+        [System.Text.Json.Serialization.JsonPropertyName("goods_tag")]
+        public string? GoodsTag { get; set; }
+
+        /// <summary>
+        /// 获取或设置是否支持开票。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("support_fapiao")]
+        [System.Text.Json.Serialization.JsonPropertyName("support_fapiao")]
+        public bool? IsSupportFapiao { get; set; }
+
+        /// <summary>
+        /// 获取或设置支付者信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("payer")]
+        [System.Text.Json.Serialization.JsonPropertyName("payer")]
+        public Types.Payer Payer { get; set; } = new Types.Payer();
+
+        /// <summary>
+        /// 获取或设置金额信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("amount")]
+        [System.Text.Json.Serialization.JsonPropertyName("amount")]
+        public Types.Amount Amount { get; set; } = new Types.Amount();
+
+        /// <summary>
+        /// 获取或设置商品信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("detail")]
+        [System.Text.Json.Serialization.JsonPropertyName("detail")]
+        public Types.Detail? Detail { get; set; }
+
+        /// <summary>
+        /// 获取或设置场景信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("scene_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("scene_info")]
+        public Types.Scene? Scene { get; set; }
+
+        /// <summary>
+        /// 获取或设置结算信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("settle_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("settle_info")]
+        public Types.Settlement? Settlement { get; set; }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionCodePayResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionCodePayResponse.cs
new file mode 100644
index 00000000..66fa6014
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/CreatePayTransactionCodePayResponse.cs
@@ -0,0 +1,9 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /pay/transactions/codepay 接口的响应。</para>
+    /// </summary>
+    public class CreatePayTransactionCodePayResponse : GetPayTransactionByOutTradeNumberResponse
+    {
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/ReversePayTransactionRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/ReversePayTransactionRequest.cs
new file mode 100644
index 00000000..c0cb9d05
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/ReversePayTransactionRequest.cs
@@ -0,0 +1,15 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /pay/transactions/out-trade-no/{out_trade_no}/reverse 接口的请求。</para>
+    /// </summary>
+    public class ReversePayTransactionRequest : ClosePayTransactionRequest
+    {
+        /// <summary>
+        /// 获取或设置微信 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("appid")]
+        public string AppId { get; set; } = string.Empty;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/ReversePayTransactionResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/ReversePayTransactionResponse.cs
new file mode 100644
index 00000000..15fc2292
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/PayTransactions/ReversePayTransactionResponse.cs
@@ -0,0 +1,29 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /pay/transactions/out-trade-no/{out_trade_no}/reverse 接口的响应。</para>
+    /// </summary>
+    public class ReversePayTransactionResponse : WechatTenpayResponse
+    {
+        /// <summary>
+        /// 获取或设置微信商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("mchid")]
+        public string MerchantId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置微信 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("appid")]
+        public string? AppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置商户订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string OutTradeNumber { get; set; } = default!;
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayRequest.cs
new file mode 100644
index 00000000..6e3f3f3f
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayRequest.cs
@@ -0,0 +1,129 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /pay/partner/transactions/codepay 接口的请求。</para>
+    /// </summary>
+    public class CreatePayPartnerTransactionCodePayRequest : WechatTenpayRequest
+    {
+        public static class Types
+        {
+            public class Amount : CreatePayTransactionCodePayRequest.Types.Amount
+            {
+            }
+
+            public class Payer : CreatePayTransactionCodePayRequest.Types.Payer
+            {
+            }
+
+            public class Detail : CreatePayTransactionCodePayRequest.Types.Detail
+            {
+            }
+
+            public class Scene : CreatePayTransactionCodePayRequest.Types.Scene
+            {
+            }
+
+            public class Settlement : CreatePayTransactionCodePayRequest.Types.Settlement
+            {
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置服务商商户号。如果不指定将使用构造 <see cref="WechatTenpayClient"/> 时的 <see cref="WechatTenpayClientOptions.MerchantId"/> 参数。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sp_mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sp_mchid")]
+        public string? MerchantId { get; set; }
+
+        /// <summary>
+        /// 获取或设置子商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sub_mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sub_mchid")]
+        public string SubMerchantId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置服务商 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sp_appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sp_appid")]
+        public string AppId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置子商户 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sub_appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sub_appid")]
+        public string? SubAppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置商品描述。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("description")]
+        [System.Text.Json.Serialization.JsonPropertyName("description")]
+        public string Description { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置商户订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string OutTradeNumber { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置附加数据。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("attach")]
+        [System.Text.Json.Serialization.JsonPropertyName("attach")]
+        public string? Attachment { get; set; }
+
+        /// <summary>
+        /// 获取或设置订单优惠标记。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("goods_tag")]
+        [System.Text.Json.Serialization.JsonPropertyName("goods_tag")]
+        public string? GoodsTag { get; set; }
+
+        /// <summary>
+        /// 获取或设置是否支持开票。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("support_fapiao")]
+        [System.Text.Json.Serialization.JsonPropertyName("support_fapiao")]
+        public bool? IsSupportFapiao { get; set; }
+
+        /// <summary>
+        /// 获取或设置金额信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("amount")]
+        [System.Text.Json.Serialization.JsonPropertyName("amount")]
+        public Types.Amount Amount { get; set; } = new Types.Amount();
+
+        /// <summary>
+        /// 获取或设置支付者信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("payer")]
+        [System.Text.Json.Serialization.JsonPropertyName("payer")]
+        public Types.Payer Payer { get; set; } = new Types.Payer();
+
+        /// <summary>
+        /// 获取或设置商品信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("detail")]
+        [System.Text.Json.Serialization.JsonPropertyName("detail")]
+        public Types.Detail? Detail { get; set; }
+
+        /// <summary>
+        /// 获取或设置场景信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("scene_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("scene_info")]
+        public Types.Scene Scene { get; set; } = new Types.Scene();
+
+        /// <summary>
+        /// 获取或设置结算信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("settle_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("settle_info")]
+        public Types.Settlement? Settlement { get; set; }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayResponse.cs
new file mode 100644
index 00000000..84ba3ecc
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayResponse.cs
@@ -0,0 +1,9 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /pay/partner/transactions/codepay 接口的响应。</para>
+    /// </summary>
+    public class CreatePayPartnerTransactionCodePayResponse : GetPayPartnerTransactionByOutTradeNumberResponse
+    {
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/ReversePayPartnerTransactionRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/ReversePayPartnerTransactionRequest.cs
new file mode 100644
index 00000000..5f917912
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/ReversePayPartnerTransactionRequest.cs
@@ -0,0 +1,22 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /pay/partner/transactions/out-trade-no/{out_trade_no}/reverse 接口的请求。</para>
+    /// </summary>
+    public class ReversePayPartnerTransactionRequest : ClosePayPartnerTransactionRequest
+    {
+        /// <summary>
+        /// 获取或设置服务商 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sp_appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sp_appid")]
+        public string? AppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置子商户 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sub_appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sub_appid")]
+        public string? SubAppId { get; set; }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/ReversePayPartnerTransactionResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/ReversePayPartnerTransactionResponse.cs
new file mode 100644
index 00000000..126facc7
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Models/_Partner/PayTransactions/ReversePayPartnerTransactionResponse.cs
@@ -0,0 +1,43 @@
+namespace SKIT.FlurlHttpClient.Wechat.TenpayV3.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /pay/partner/transactions/out-trade-no/{out_trade_no}/reverse 接口的响应。</para>
+    /// </summary>
+    public class ReversePayPartnerTransactionResponse : WechatTenpayResponse
+    {
+        /// <summary>
+        /// 获取或设置服务商商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sp_mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sp_mchid")]
+        public string MerchantId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置子商户号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sub_mchid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sub_mchid")]
+        public string SubMerchantId { get; set; } = default!;
+
+        /// <summary>
+        /// 获取或设置服务商 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sp_appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sp_appid")]
+        public string? AppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置子商户 AppId。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sub_appid")]
+        [System.Text.Json.Serialization.JsonPropertyName("sub_appid")]
+        public string? SubAppId { get; set; }
+
+        /// <summary>
+        /// 获取或设置商户订单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("out_trade_no")]
+        [System.Text.Json.Serialization.JsonPropertyName("out_trade_no")]
+        public string OutTradeNumber { get; set; } = default!;
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/CreatePayTransactionCodePayRequest.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/CreatePayTransactionCodePayRequest.json
new file mode 100644
index 00000000..dd6db68c
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/CreatePayTransactionCodePayRequest.json
@@ -0,0 +1,40 @@
+{
+    "appid": "wxd678efh567hg6787",
+    "mchid": "1230000109",
+    "description": "Image形象店-深圳腾大-QQ公仔",
+    "out_trade_no": "1217752501201407033233368018",
+    "attach": "自定义数据说明",
+    "goods_tag": "WXG",
+    "support_fapiao": false,
+    "payer": {
+        "auth_code": "130061098828009406"
+    },
+    "amount": {
+        "total": 100,
+        "currency": "CNY"
+    },
+    "scene_info": {
+        "device_id": "013467007045764",
+        "device_ip": "128.0.0.1",
+        "store_info": {
+            "id": "0001",
+            "out_id": "A1111"
+        }
+    },
+    "detail": {
+        "cost_price": 608800,
+        "invoice_id": "微信123",
+        "goods_detail": [
+            {
+                "merchant_goods_id": "1246464644",
+                "wxpay_goods_id": "1001",
+                "goods_name": "iPhoneX 256G",
+                "quantity": 1,
+                "unit_price": 528800
+            }
+        ]
+    },
+    "settle_info": {
+        "profit_sharing": false
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/CreatePayTransactionCodePayResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/CreatePayTransactionCodePayResponse.json
new file mode 100644
index 00000000..2db1e9f8
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/CreatePayTransactionCodePayResponse.json
@@ -0,0 +1,44 @@
+{
+    "appid": "wxd678efh567hg6787",
+    "mchid": "1230000109",
+    "out_trade_no": "1217752501201407033233368018",
+    "transaction_id": "1217752501201407033233368018",
+    "trade_type": "MICROPAY",
+    "bank_type": "CCB_DEBIT",
+    "success_time": "2018-06-08T10:34:56+08:00",
+    "trade_state": "SUCCESS",
+    "trade_state_desc": "支付成功",
+    "attach": "自定义数据说明",
+    "payer": {
+        "openid": "oUpF8uMuAJO_M2pxb1Q9zNjWeS6o"
+    },
+    "amount": {
+        "total": 100,
+        "payer_total": 100,
+        "currency": "CNY",
+        "payer_currency": "CNY"
+    },
+    "promotion_detail": [
+        {
+            "coupon_id": "109519",
+            "name": "单品惠-6",
+            "scope": "GLOBAL",
+            "type": "CASH",
+            "amount": 100,
+            "stock_id": "931386",
+            "wechatpay_contribute": 0,
+            "merchant_contribute": 0,
+            "other_contribute": 0,
+            "currency": "CNY",
+            "goods_detail": [
+                {
+                    "goods_id": "M1006",
+                    "quantity": 1,
+                    "unit_price": 100,
+                    "discount_amount": 1,
+                    "goods_remark": "商品备注信息"
+                }
+            ]
+        }
+    ]
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/ReversePayTransactionRequest.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/ReversePayTransactionRequest.json
new file mode 100644
index 00000000..34ca55ca
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/ReversePayTransactionRequest.json
@@ -0,0 +1,4 @@
+{
+    "appid": "wxd678efh567hg6787",
+    "mchid": "1230000109"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/ReversePayTransactionResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/ReversePayTransactionResponse.json
new file mode 100644
index 00000000..a395998f
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/PayTransactions/ReversePayTransactionResponse.json
@@ -0,0 +1,5 @@
+{
+    "appid": "wxd678efh567hg6787",
+    "mchid": "1230000109",
+    "out_trade_no": "1217752501201407033233368018"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayRequest.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayRequest.json
new file mode 100644
index 00000000..d3631a82
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayRequest.json
@@ -0,0 +1,42 @@
+{
+    "sp_appid": "wxd678efh567hg6787",
+    "sp_mchid": "1230000109",
+    "sub_appid": "wxd678efh567hg6787",
+    "sub_mchid": "1230000109",
+    "description": "Image形象店-深圳腾大-QQ公仔",
+    "out_trade_no": "1217752501201407033233368018",
+    "attach": "自定义数据说明",
+    "goods_tag": "WXG",
+    "support_fapiao": false,
+    "payer": {
+        "auth_code": "130061098828009406"
+    },
+    "amount": {
+        "total": 100,
+        "currency": "CNY"
+    },
+    "scene_info": {
+        "device_id": "013467007045764",
+        "device_ip": "128.0.0.1",
+        "store_info": {
+            "id": "0001",
+            "out_id": "A1111"
+        }
+    },
+    "detail": {
+        "cost_price": 608800,
+        "invoice_id": "微信123",
+        "goods_detail": [
+            {
+                "merchant_goods_id": "1246464644",
+                "wxpay_goods_id": "1001",
+                "goods_name": "iPhoneX 256G",
+                "quantity": 1,
+                "unit_price": 528800
+            }
+        ]
+    },
+    "settle_info": {
+        "profit_sharing": false
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayResponse.json
new file mode 100644
index 00000000..7435da8a
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/CreatePayPartnerTransactionCodePayResponse.json
@@ -0,0 +1,47 @@
+{
+    "sp_appid": "wxd678efh567hg6787",
+    "sp_mchid": "1230000109",
+    "sub_appid": "wxd678efh567hg6787",
+    "sub_mchid": "1230000109",
+    "out_trade_no": "1217752501201407033233368018",
+    "transaction_id": "1217752501201407033233368018",
+    "trade_type": "MICROPAY",
+    "bank_type": "CCB_DEBIT",
+    "success_time": "2018-06-08T10:34:56+08:00",
+    "trade_state": "SUCCESS",
+    "trade_state_desc": "支付成功",
+    "attach": "自定义数据说明",
+    "payer": {
+        "sp_openid": "oUpF8uMuAJO_M2pxb1Q9zNjWeS6o",
+        "sub_openid": "oUpF8uMuAJO_M2pxb1Q9zNjWeS6o"
+    },
+    "amount": {
+        "total": 100,
+        "payer_total": 100,
+        "currency": "CNY",
+        "payer_currency": "CNY"
+    },
+    "promotion_detail": [
+        {
+            "coupon_id": "109519",
+            "name": "单品惠-6",
+            "scope": "GLOBAL",
+            "type": "CASH",
+            "amount": 100,
+            "stock_id": "931386",
+            "wechatpay_contribute": 0,
+            "merchant_contribute": 0,
+            "other_contribute": 0,
+            "currency": "CNY",
+            "goods_detail": [
+                {
+                    "goods_id": "M1006",
+                    "quantity": 1,
+                    "unit_price": 100,
+                    "discount_amount": 1,
+                    "goods_remark": "商品备注信息"
+                }
+            ]
+        }
+    ]
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/ReversePayPartnerTransactionRequest.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/ReversePayPartnerTransactionRequest.json
new file mode 100644
index 00000000..a5905a59
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/ReversePayPartnerTransactionRequest.json
@@ -0,0 +1,6 @@
+{
+    "sp_appid": "wxd678efh567hg6787",
+    "sp_mchid": "1230000109",
+    "sub_appid": "wxd678efh567hg6787",
+    "sub_mchid": "1230000109"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/ReversePayPartnerTransactionResponse.json b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/ReversePayPartnerTransactionResponse.json
new file mode 100644
index 00000000..86952aab
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.TenpayV3.UnitTests/ModelSamples/_/_Partner/PayTransactions/ReversePayPartnerTransactionResponse.json
@@ -0,0 +1,7 @@
+{
+    "sp_appid": "wxd678efh567hg6787",
+    "sp_mchid": "1230000109",
+    "sub_appid": "wxd678efh567hg6787",
+    "sub_mchid": "1230000109",
+    "out_trade_no": "1217752501201407033233368018"
+}