diff --git a/README.md b/README.md
index a2a861c..9a5230d 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,11 @@
 ## 开源协议
 **Apache 2.0**
 
+## 项目地址
+- [GitHub](https://github.com/NotFound403/payment-spring-boot)
+- [Gitee](https://gitee.com/felord/payment-spring-boot)
+
 ## 文档地址
-[payment-spring-boot 文档](https://notfound403.github.io/payment-spring-boot)
+[payment-spring-boot GitHub文档](https://notfound403.github.io/payment-spring-boot)
+[payment-spring-boot Gitee文档](https://felord.gitee.io/payment-spring-boot)
  
diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/WechatPayCallback.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/WechatPayCallback.java
index 0854378..f38b7e1 100644
--- a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/WechatPayCallback.java
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/WechatPayCallback.java
@@ -17,6 +17,8 @@ import java.util.function.Consumer;
 
 /**
  * 微信支付回调工具.
+ * <p>
+ * 支付通知http应答码为200或204才会当作正常接收，当回调处理异常时，应答的HTTP状态码应为500，或者4xx。
  *
  * @author felord.cn
  * @since 1.0.0.RELEASE