diff --git a/src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteBotExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteBotExtensions.cs
index 175212f6..71b3aad2 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteBotExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteBotExtensions.cs
@@ -12,7 +12,7 @@ namespace SKIT.FlurlHttpClient.Wechat.OpenAI
         /// <para>异步调用 [POST] /batchimportskill/{TOKEN} 接口。</para>
         /// <para>
         /// REF: <br/>
-        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/bot/batchimportskill.html ]]>
+        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/deprecated/bot/batchimportskill.html ]]>
         /// </para>
         /// </summary>
         /// <param name="client"></param>
@@ -34,7 +34,7 @@ namespace SKIT.FlurlHttpClient.Wechat.OpenAI
         /// <para>异步调用 [POST] /publish/{TOKEN} 接口。</para>
         /// <para>
         /// REF: <br/>
-        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/bot/publish.html ]]>
+        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/deprecated/bot/publish.html ]]>
         /// </para>
         /// </summary>
         /// <param name="client"></param>
@@ -56,7 +56,7 @@ namespace SKIT.FlurlHttpClient.Wechat.OpenAI
         /// <para>异步调用 [POST] /publish_progress/{TOKEN} 接口。</para>
         /// <para>
         /// REF: <br/>
-        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/bot/publish_progress.html ]]>
+        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/deprecated/bot/publish_progress.html ]]>
         /// </para>
         /// </summary>
         /// <param name="client"></param>
@@ -78,7 +78,7 @@ namespace SKIT.FlurlHttpClient.Wechat.OpenAI
         /// <para>异步调用 [POST] /setautoreply/{TOKEN} 接口。</para>
         /// <para>
         /// REF: <br/>
-        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/bot/setautoreply.html ]]>
+        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/deprecated/bot/setautoreply.html ]]>
         /// </para>
         /// </summary>
         /// <param name="client"></param>
@@ -100,7 +100,7 @@ namespace SKIT.FlurlHttpClient.Wechat.OpenAI
         /// <para>异步调用 [POST] /label/batchset/{TOKEN} 接口。</para>
         /// <para>
         /// REF: <br/>
-        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/bot/batchsetlabel.html ]]>
+        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/deprecated/bot/batchsetlabel.html ]]>
         /// </para>
         /// </summary>
         /// <param name="client"></param>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteDialogExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteDialogExtensions.cs
index 3dadb407..4747e1c5 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteDialogExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.OpenAI/Extensions/WechatOpenAIClientExecuteDialogExtensions.cs
@@ -12,7 +12,7 @@ namespace SKIT.FlurlHttpClient.Wechat.OpenAI
         /// <para>异步调用 [POST] /sign/{TOKEN} 接口。</para>
         /// <para>
         /// REF: <br/>
-        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/INTERFACEDOCUMENT.html#_1-%E8%8E%B7%E5%8F%96signature%E6%8E%A5%E5%8F%A3 ]]>
+        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/deprecated/INTERFACEDOCUMENT.html ]]>
         /// </para>
         /// </summary>
         /// <param name="client"></param>
@@ -34,7 +34,7 @@ namespace SKIT.FlurlHttpClient.Wechat.OpenAI
         /// <para>异步调用 [POST] /aibot/{TOKEN} 接口。</para>
         /// <para>
         /// REF: <br/>
-        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/INTERFACEDOCUMENT.html#_2-%E6%99%BA%E8%83%BD%E5%AF%B9%E8%AF%9D%E6%8E%A5%E5%8F%A3 ]]>
+        /// <![CDATA[ https://developers.weixin.qq.com/doc/aispeech/confapi/deprecated/INTERFACEDOCUMENT.html ]]>
         /// </para>
         /// </summary>
         /// <param name="client"></param>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.OpenAI/WechatOpenAIEndpoints.cs b/src/SKIT.FlurlHttpClient.Wechat.OpenAI/WechatOpenAIEndpoints.cs
index 285bfa48..b32baf08 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.OpenAI/WechatOpenAIEndpoints.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.OpenAI/WechatOpenAIEndpoints.cs
@@ -1,4 +1,4 @@
-namespace SKIT.FlurlHttpClient.Wechat.OpenAI
+namespace SKIT.FlurlHttpClient.Wechat.OpenAI
 {
     /// <summary>
     /// <para>微信智能对话 API 接口域名。</para>
@@ -8,6 +8,11 @@
         /// <summary>
         /// 主域名（默认）。
         /// </summary>
-        public const string DEFAULT = "https://openai.weixin.qq.com/openapi/";
+        public const string DEFAULT = "https://chatbot.weixin.qq.com/openapi";
+
+        /// <summary>
+        /// 备用域名。
+        /// </summary>
+        public const string BACKUP = "https://openai.weixin.qq.com/openapi";
     }
 }