diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientEventExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientEventExtensions.cs
index ab4a749c..48863d34 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientEventExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientEventExtensions.cs
@@ -33,7 +33,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
             where TEvent : WechatApiEvent
         {
             if (client == null) throw new ArgumentNullException(nameof(client));
-            if (string.IsNullOrEmpty(callbackJson)) throw new ArgumentNullException(callbackJson);
+            if (callbackJson == null) throw new ArgumentNullException(callbackJson);
 
             try
             {
@@ -62,7 +62,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
             where TEvent : WechatApiEvent
         {
             if (client == null) throw new ArgumentNullException(nameof(client));
-            if (string.IsNullOrEmpty(callbackXml)) throw new ArgumentNullException(callbackXml);
+            if (callbackXml == null) throw new ArgumentNullException(callbackXml);
 
             try
             {
@@ -249,9 +249,9 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
         /// <para>REF: https://developers.weixin.qq.com/doc/offiaccount/Basic_Information/Access_Overview.html </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 nonce 字段。</param>
-        /// <param name="callbackSignature">微信回调通知中的 signature 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "timestamp" 查询参数。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "nonce" 查询参数。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "signature" 查询参数。</param>
         /// <returns></returns>
         public static bool VerifyEventSignatureForEcho(this WechatApiClient client, string callbackTimestamp, string callbackNonce, string callbackSignature)
         {
@@ -266,14 +266,14 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
         }
 
         /// <summary>
-        /// <para>验证回调通知事件签名。</para>
+        /// <para>验证回调通知事件签名（仅安全模式）。</para>
         /// <para>REF: https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Message_encryption_and_decryption_instructions.html </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 nonce 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "timestamp" 查询参数。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "nonce" 查询参数。</param>
         /// <param name="callbackJson">微信回调通知中请求正文（JSON 格式）。</param>
-        /// <param name="callbackSignature">微信回调通知中的 msg_signature 字段。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "msg_signature" 查询参数。</param>
         /// <returns></returns>
         public static bool VerifyEventSignatureFromJson(this WechatApiClient client, string callbackTimestamp, string callbackNonce, string callbackJson, string callbackSignature)
         {
@@ -298,14 +298,14 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
         }
 
         /// <summary>
-        /// <para>验证回调通知事件签名。</para>
+        /// <para>验证回调通知事件签名（仅安全模式）。</para>
         /// <para>REF: https://developers.weixin.qq.com/doc/offiaccount/Message_Management/Message_encryption_and_decryption_instructions.html </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 nonce 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "timestamp" 查询参数。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "nonce" 查询参数。</param>
         /// <param name="callbackXml">微信回调通知中请求正文（XML 格式）。</param>
-        /// <param name="callbackSignature">微信回调通知中的 msg_signature 字段。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "msg_signature" 查询参数。</param>
         /// <returns></returns>
         public static bool VerifyEventSignatureFromXml(this WechatApiClient client, string callbackTimestamp, string callbackNonce, string callbackXml, string callbackSignature)
         {
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientEventVerificationExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientEventVerificationExtensions.cs
index 64260abb..fb37abdd 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientEventVerificationExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV3/Extensions/WechatTenpayClientEventVerificationExtensions.cs
@@ -13,11 +13,11 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
         /// <para>REF: https://pay.weixin.qq.com/wiki/doc/apiv3_partner/wechatpay/wechatpay4_1.shtml </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 Wechatpay-Timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 Wechatpay-Nonce 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "Wechatpay-Timestamp" 请求标头。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "Wechatpay-Nonce" 请求标头。</param>
         /// <param name="callbackBody">微信回调通知中请求正文。</param>
-        /// <param name="callbackSignature">微信回调通知中的 Wechatpay-Signature 字段。</param>
-        /// <param name="callbackSerialNumber">微信回调通知中的 Wechatpay-Serial 字段。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "Wechatpay-Signature" 请求标头。</param>
+        /// <param name="callbackSerialNumber">微信回调通知中的 "Wechatpay-Serial" 请求标头。</param>
         /// <returns></returns>
         public static bool VerifyEventSignature(this WechatTenpayClient client, string callbackTimestamp, string callbackNonce, string callbackBody, string callbackSignature, string callbackSerialNumber)
         {
@@ -38,12 +38,12 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
         /// <para>REF: https://pay.weixin.qq.com/wiki/doc/apiv3_partner/wechatpay/wechatpay4_1.shtml </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 Wechatpay-Timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 Wechatpay-Nonce 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "Wechatpay-Timestamp" 请求标头。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "Wechatpay-Nonce" 请求标头。</param>
         /// <param name="callbackBody">微信回调通知中请求正文。</param>
-        /// <param name="callbackSignature">微信回调通知中的 Wechatpay-Signature 字段。</param>
-        /// <param name="callbackSignatureType">微信回调通知中的 Wechatpay-Signature-Type 字段。</param>
-        /// <param name="callbackSerialNumber">微信回调通知中的 Wechatpay-Serial 字段。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "Wechatpay-Signature" 请求标头。</param>
+        /// <param name="callbackSignatureType">微信回调通知中的 "Wechatpay-Signature-Type" 请求标头。</param>
+        /// <param name="callbackSerialNumber">微信回调通知中的 "Wechatpay-Serial" 请求标头。</param>
         /// <returns></returns>
         public static bool VerifyEventSignature(this WechatTenpayClient client, string callbackTimestamp, string callbackNonce, string callbackBody, string callbackSignature, string callbackSignatureType, string callbackSerialNumber)
         {
@@ -65,11 +65,11 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
         /// <para>REF: https://pay.weixin.qq.com/wiki/doc/apiv3_partner/wechatpay/wechatpay4_1.shtml </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 Wechatpay-Timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 Wechatpay-Nonce 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "Wechatpay-Timestamp" 请求标头。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "Wechatpay-Nonce" 请求标头。</param>
         /// <param name="callbackBody">微信回调通知中请求正文。</param>
-        /// <param name="callbackSignature">微信回调通知中的 Wechatpay-Signature 字段。</param>
-        /// <param name="callbackSerialNumber">微信回调通知中的 Wechatpay-Serial 字段。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "Wechatpay-Signature" 请求标头。</param>
+        /// <param name="callbackSerialNumber">微信回调通知中的 "Wechatpay-Serial" 请求标头。</param>
         /// <param name="error"></param>
         /// <returns></returns>
         public static bool VerifyEventSignature(this WechatTenpayClient client, string callbackTimestamp, string callbackNonce, string callbackBody, string callbackSignature, string callbackSerialNumber, out Exception? error)
@@ -92,12 +92,12 @@ namespace SKIT.FlurlHttpClient.Wechat.TenpayV3
         /// <para>REF: https://pay.weixin.qq.com/wiki/doc/apiv3_partner/wechatpay/wechatpay4_1.shtml </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 Wechatpay-Timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 Wechatpay-Nonce 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "Wechatpay-Timestamp" 请求标头。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "Wechatpay-Nonce" 请求标头。</param>
         /// <param name="callbackBody">微信回调通知中请求正文。</param>
-        /// <param name="callbackSignature">微信回调通知中的 Wechatpay-Signature 字段。</param>
-        /// <param name="callbackSignatureType">微信回调通知中的 Wechatpay-Signature-Type 字段。</param>
-        /// <param name="callbackSerialNumber">微信回调通知中的 Wechatpay-Serial 字段。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "Wechatpay-Signature" 请求标头。</param>
+        /// <param name="callbackSignatureType">微信回调通知中的 "Wechatpay-Signature-Type" 请求标头。</param>
+        /// <param name="callbackSerialNumber">微信回调通知中的 "Wechatpay-Serial" 请求标头。</param>
         /// <param name="error"></param>
         /// <returns></returns>
         public static bool VerifyEventSignature(this WechatTenpayClient client, string callbackTimestamp, string callbackNonce, string callbackBody, string callbackSignature, string callbackSignatureType, string callbackSerialNumber, out Exception? error)
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientEventExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientEventExtensions.cs
index 4d91b560..760ed4a6 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientEventExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientEventExtensions.cs
@@ -235,10 +235,10 @@ namespace SKIT.FlurlHttpClient.Wechat.Work
         /// <para>REF: https://developer.work.weixin.qq.com/document/path/91148 </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 nonce 字段。</param>
-        /// <param name="callbackEcho">微信回调通知中的 echostr 字段。</param>
-        /// <param name="callbackSignature">微信回调通知中的 msg_signature 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "timestamp" 查询参数。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "nonce" 查询参数。</param>
+        /// <param name="callbackEcho">微信回调通知中的 "echostr" 查询参数。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "msg_signature" 查询参数。</param>
         /// <param name="replyEcho"></param>
         /// <returns></returns>
         public static bool VerifyEventSignatureForEcho(this WechatWorkClient client, string callbackTimestamp, string callbackNonce, string callbackEcho, string callbackSignature, out string? replyEcho)
@@ -278,10 +278,10 @@ namespace SKIT.FlurlHttpClient.Wechat.Work
         /// <para>REF: https://developer.work.weixin.qq.com/document/path/91148 </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 nonce 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "timestamp" 查询参数。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "nonce" 查询参数。</param>
         /// <param name="callbackJson">微信回调通知中请求正文（JSON 格式）。</param>
-        /// <param name="callbackSignature">微信回调通知中的 msg_signature 字段。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "msg_signature" 查询参数。</param>
         /// <returns></returns>
         public static bool VerifyEventSignatureFromJson(this WechatWorkClient client, string callbackTimestamp, string callbackNonce, string callbackJson, string callbackSignature)
         {
@@ -312,10 +312,10 @@ namespace SKIT.FlurlHttpClient.Wechat.Work
         /// <para>REF: https://developer.work.weixin.qq.com/document/path/91148 </para>
         /// </summary>
         /// <param name="client"></param>
-        /// <param name="callbackTimestamp">微信回调通知中的 timestamp 字段。</param>
-        /// <param name="callbackNonce">微信回调通知中的 nonce 字段。</param>
+        /// <param name="callbackTimestamp">微信回调通知中的 "timestamp" 查询参数。</param>
+        /// <param name="callbackNonce">微信回调通知中的 "nonce" 查询参数。</param>
         /// <param name="callbackXml">微信回调通知中请求正文（XML 格式）。</param>
-        /// <param name="callbackSignature">微信回调通知中的 msg_signature 字段。</param>
+        /// <param name="callbackSignature">微信回调通知中的 "msg_signature" 查询参数。</param>
         /// <returns></returns>
         public static bool VerifyEventSignatureFromXml(this WechatWorkClient client, string callbackTimestamp, string callbackNonce, string callbackXml, string callbackSignature)
         {