diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteChannelsExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteChannelsExtensions.cs
index fd9d73bb..aec40d22 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteChannelsExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteChannelsExtensions.cs
@@ -5408,6 +5408,31 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
         }
         #endregion
 
+        #region ECProduct/ExternalProduct
+        /// <summary>
+        /// <para>异步调用 [POST] /channels/ec/product/externalproductmapping 接口。</para>
+        /// <para>
+        /// REF: <br/>
+        /// <![CDATA[ https://developers.weixin.qq.com/doc/store/shop/API/channels-shop-product/shop/api_externalproductmapping.html ]]>
+        /// </para> 
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="request"></param>
+        /// <param name="cancellationToken"></param>
+        /// <returns></returns>
+        public static async Task<Models.ChannelsECProductCategoryExternalProductMappingResponse> ExecuteChannelsECProductCategoryExternalProductMappingAsync(this WechatApiClient client, Models.ChannelsECProductCategoryExternalProductMappingRequest 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", "product", "externalproductmapping")
+                .SetQueryParam("access_token", request.AccessToken);
+
+            return await client.SendFlurlRequestAsJsonAsync<Models.ChannelsECProductCategoryExternalProductMappingResponse>(flurlReq, data: request, cancellationToken: cancellationToken).ConfigureAwait(false);
+        }
+        #endregion
+
         #region ECProduct/Gift
         /// <summary>
         /// <para>异步调用 [POST] /channels/ec/product/gift/add 接口。</para>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingRequest.cs
new file mode 100644
index 00000000..afab1eb6
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingRequest.cs
@@ -0,0 +1,36 @@
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /channels/ec/product/externalproductmapping 接口的请求。</para>
+    /// </summary>
+    public class ChannelsECProductCategoryExternalProductMappingRequest : WechatApiRequest, IInferable<ChannelsECProductCategoryExternalProductMappingRequest, ChannelsECProductCategoryExternalProductMappingResponse>
+    {
+        /// <summary>
+        /// 获取或设置商品类目 ID。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("cat_id")]
+        [System.Text.Json.Serialization.JsonPropertyName("cat_id")]
+        public long CategoryId { get; set; }
+
+        /// <summary>
+        /// 获取或设置外部商品属性键。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("external_attribute_name")]
+        [System.Text.Json.Serialization.JsonPropertyName("external_attribute_name")]
+        public string? ExternalAttributeName { get; set; }
+
+        /// <summary>
+        /// 获取或设置外部商品属性值。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("external_attribute_value")]
+        [System.Text.Json.Serialization.JsonPropertyName("external_attribute_value")]
+        public string? ExternalAttributeValue { get; set; }
+
+        /// <summary>
+        /// 获取或设置外部商品类目名称。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("external_category_name")]
+        [System.Text.Json.Serialization.JsonPropertyName("external_category_name")]
+        public string? ExternalCategoryName { get; set; }
+    }
+}
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingResponse.cs
new file mode 100644
index 00000000..158cff44
--- /dev/null
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingResponse.cs
@@ -0,0 +1,36 @@
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+{
+    /// <summary>
+    /// <para>表示 [POST] /channels/ec/product/externalproductmapping 接口的响应。</para>
+    /// </summary>
+    public class ChannelsECProductCategoryExternalProductMappingResponse : WechatApiResponse
+    {
+        /// <summary>
+        /// 获取或设置外部商品属性键。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("external_attribute_name")]
+        [System.Text.Json.Serialization.JsonPropertyName("external_attribute_name")]
+        public string? ExternalAttributeName { get; set; }
+
+        /// <summary>
+        /// 获取或设置外部商品属性值。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("external_attribute_value")]
+        [System.Text.Json.Serialization.JsonPropertyName("external_attribute_value")]
+        public string? ExternalAttributeValue { get; set; }
+
+        /// <summary>
+        /// 获取或设置内部商品属性键。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("internal_attribute_name")]
+        [System.Text.Json.Serialization.JsonPropertyName("internal_attribute_name")]
+        public string? InternalAttributeName { get; set; }
+
+        /// <summary>
+        /// 获取或设置内部商品属性值列表。
+        /// </summary>
+        [Newtonsoft.Json.JsonProperty("internal_attribute_value")]
+        [System.Text.Json.Serialization.JsonPropertyName("internal_attribute_value")]
+        public string[]? InternalAttributeValueList { get; set; }
+    }
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingRequest.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingRequest.json
new file mode 100644
index 00000000..ca56bf6d
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingRequest.json
@@ -0,0 +1,6 @@
+{
+    "cat_id": 6261,
+    "external_attribute_name": "帮面材质",
+    "external_attribute_value": "塑胶",
+    "external_category_name": "母婴:童鞋:雨鞋"
+}
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingResponse.json b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingResponse.json
new file mode 100644
index 00000000..cd7308fa
--- /dev/null
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/ModelSamples/Channels/ECProduct/ExternalProduct/ChannelsECProductCategoryExternalProductMappingResponse.json
@@ -0,0 +1,8 @@
+{
+    "errcode": 0,
+    "errmsg": "ok",
+    "external_attribute_name": "帮面材质",
+    "external_attribute_value": "塑胶",
+    "internal_attribute_name": "鞋面材质",
+    "internal_attribute_value": [ "塑胶" ]
+}