diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteChannelsExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteChannelsExtensions.cs
index 40649c44..b63bc115 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteChannelsExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteChannelsExtensions.cs
@@ -2976,6 +2976,29 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
             return await client.SendFlurlRequestAsJsonAsync<Models.ChannelsECLogisticsEWaybillOrderCreateResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
         }
 
+        /// <summary>
+        /// <para>异步调用 [POST] /channels/ec/logistics/ewaybill/biz/order/addsuborder 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://developers.weixin.qq.com/doc/store/shop/API/ewaybill/add_suborder.html ]]>
+        /// </para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.ChannelsECLogisticsEWaybillOrderAddSubOrderResponse> ExecuteChannelsECLogisticsEWaybillOrderAddSubOrderAsync(this WechatApiClient client, Models.ChannelsECLogisticsEWaybillOrderAddSubOrderRequest 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, "channels", "ec", "logistics", "ewaybill", "biz", "order", "addsuborder")
+                .SetQueryParam("access_token", request.AccessToken);
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.ChannelsECLogisticsEWaybillOrderAddSubOrderResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
+
         /// <summary>
         /// <para>异步调用 [POST] /channels/ec/logistics/ewaybill/biz/order/cancel 接口。</para>
         /// <para>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderRequest.cs
new file mode 100644
index 00000000..beaeacfb
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderRequest.cs
@@ -0,0 +1,80 @@
+using System.Collections.Generic;
+
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /channels/ec/logistics/ewaybill/biz/order/addsuborder 接口的请求。</para>
+    /// </summary>
+    public class ChannelsECLogisticsEWaybillOrderAddSubOrderRequest : WechatApiRequest, IInferable<ChannelsECLogisticsEWaybillOrderAddSubOrderRequest, ChannelsECLogisticsEWaybillOrderAddSubOrderResponse>
+    {
+        public static class Types
+        {
+            public class SubPackage : ChannelsECLogisticsEWaybillOrderCreateRequest.Types.DeliveryInfo.Types.SubPackage
+            {
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置电子面单 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("ewaybill_order_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("ewaybill_order_id")]
+        public string EWaybillOrderId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置快递单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("waybill_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("waybill_id")]
+        public string WaybillId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置快递公司 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("delivery_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("delivery_id")]
+        public string DeliveryId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置店铺 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("shop_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("shop_id")]
+        public string ShopId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置电子面单账号 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("ewaybill_acct_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("ewaybill_acct_id")]
+        public string EWaybillAccountId { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 获取或设置追加面单数量。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("add_package_quantity")]
+        [System.Text.Json.Serialization.JsonPropertyName("add_package_quantity")]
+        public int AddPackageQuantity { get; set; }
+
+        /// <summary>
+        /// 获取或设置面单模板 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("template_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("template_id")]
+        public string? TemplateId { get; set; }
+
+        /// <summary>
+        /// 获取或设置子件列表。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("subpackage_list")]
+        [System.Text.Json.Serialization.JsonPropertyName("subpackage_list")]
+        public IList<Types.SubPackage>? SubPackageList { get; set; }
+
+        /// <summary>
+        /// 获取或设置子单额外信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("sub_order_ext_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("sub_order_ext_info")]
+        public string? SubOrderExtraInfo { get; set; }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderResponse.cs
new file mode 100644
index 00000000..760d9965
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderResponse.cs
@@ -0,0 +1,50 @@
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /channels/ec/logistics/ewaybill/biz/order/addsuborder 接口的响应。</para>
+    /// </summary>
+    public class ChannelsECLogisticsEWaybillOrderAddSubOrderResponse : WechatApiResponse
+    {
+        public static class Types
+        {
+            public class SubWaybill : ChannelsECLogisticsEWaybillOrderCreateResponse.Types.SubWaybill
+            {
+            }
+        }
+
+        /// <summary>
+        /// 获取或设置电子面单 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("ewaybill_order_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("ewaybill_order_id")]
+        public string? EWaybillOrderId { get; set; }
+
+        /// <summary>
+        /// 获取或设置快递单号。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("waybill_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("waybill_id")]
+        public string? WaybillId { get; set; }
+
+        /// <summary>
+        /// 获取或设置快递公司错误信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("delivery_error_msg")]
+        [System.Text.Json.Serialization.JsonPropertyName("delivery_error_msg")]
+        public string? DeliveryErrorMessage { get; set; }
+
+        /// <summary>
+        /// 获取或设置打印报文信息。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("print_info")]
+        [System.Text.Json.Serialization.JsonPropertyName("print_info")]
+        public string? PrintInfo { get; set; }
+
+        /// <summary>
+        /// 获取或设置子单列表。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("waybill_id_list")]
+        [System.Text.Json.Serialization.JsonPropertyName("waybill_id_list")]
+        public Types.SubWaybill[]? SubWaybillList { get; set; }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderCreateRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderCreateRequest.cs
index 474337ea..cf424a62 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderCreateRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderCreateRequest.cs
@@ -246,7 +246,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Models
         /// </summary>
         [Newtonsoft.Json.JsonProperty("ewaybill_acct_id")]
         [System.Text.Json.Serialization.JsonPropertyName("ewaybill_acct_id")]
-        public string AccountId { get; set; } = string.Empty;
+        public string EWaybillAccountId { get; set; } = string.Empty;
 
         /// <summary>
         /// 获取或设置面单模板 ID。
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderGetResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderGetResponse.cs
index 39f639c2..0b967fc4 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderGetResponse.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderGetResponse.cs
@@ -194,7 +194,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Models
                 /// </summary>
                 [Newtonsoft.Json.JsonProperty("ewaybill_acct_id")]
                 [System.Text.Json.Serialization.JsonPropertyName("ewaybill_acct_id")]
-                public string AccountId { get; set; } = default!;
+                public string EWaybillAccountId { get; set; } = default!;
 
                 /// <summary>
                 /// 获取或设置寄件人信息。
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderPrecreateRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderPrecreateRequest.cs
index 0334fd24..a2765dc3 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderPrecreateRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderPrecreateRequest.cs
@@ -155,7 +155,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Models
         /// </summary>
         [Newtonsoft.Json.JsonProperty("ewaybill_acct_id")]
         [System.Text.Json.Serialization.JsonPropertyName("ewaybill_acct_id")]
-        public string AccountId { get; set; } = string.Empty;
+        public string EWaybillAccountId { get; set; } = string.Empty;
 
         /// <summary>
         /// 获取或设置寄件人信息。
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderRequest.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderRequest.json
new file mode 100644
index 00000000..befa26ee
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderRequest.json
@@ -0,0 +1,8 @@
+{
+    "ewaybill_order_id": "xxxxxxx",
+    "delivery_id": "JD",
+    "waybill_id": "xxxxxxx",
+    "add_package_quantity": 1,
+    "shop_id": "xxxxxx",
+    "ewaybill_acct_id": "xxxxx"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderResponse.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderResponse.json
new file mode 100644
index 00000000..af98e1a2
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECLogistics/EWaybill/Order/ChannelsECLogisticsEWaybillOrderAddSubOrderResponse.json
@@ -0,0 +1,24 @@
+{
+    "errcode": 0,
+    "errmsg": "ok",
+    "delivery_error_msg": "调用成功",
+    "waybill_id": "JDAWX0161464774",
+    "waybill_id_list": [
+        {
+            "create_time": 1734508828,
+            "waybill_id": "JDAWX0161464774-1-3-",
+            "waybill_type": 2
+        },
+        {
+            "create_time": 1734508828,
+            "waybill_id": "JDAWX0161464774-2-3-",
+            "waybill_type": 2
+        },
+        {
+            "create_time": 1734508828,
+            "waybill_id": "JDAWX0161464774-3-3-",
+            "waybill_type": 2
+        }
+    ],
+    "print_info": "xxxxxxx"
+}