diff --git a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/WeixinProxy.java b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/WeixinProxy.java
index 3095152d..90484f17 100644
--- a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/WeixinProxy.java
+++ b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/WeixinProxy.java
@@ -3,6 +3,9 @@ package com.foxinmy.weixin4j.wxa;
 import com.foxinmy.weixin4j.model.WeixinAccount;
 import com.foxinmy.weixin4j.wxa.api.LoginApi;
 
+/**
+ * @since 1.8
+ */
 public class WeixinProxy {
 
 	private final LoginApi loginApi;
diff --git a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/LoginApi.java b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/LoginApi.java
index ce21b612..1a664931 100644
--- a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/LoginApi.java
+++ b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/LoginApi.java
@@ -6,6 +6,9 @@ import com.foxinmy.weixin4j.http.weixin.WeixinResponse;
 import com.foxinmy.weixin4j.model.WeixinAccount;
 import com.foxinmy.weixin4j.wxa.model.Session;
 
+/**
+ * @since 1.8
+ */
 public class LoginApi extends WxaApi {
 
 	private final WeixinAccount weixinAccount;
diff --git a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/WxaApi.java b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/WxaApi.java
index 03a2236e..f4dc2b62 100644
--- a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/WxaApi.java
+++ b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/WxaApi.java
@@ -4,6 +4,9 @@ import java.util.ResourceBundle;
 
 import com.foxinmy.weixin4j.api.BaseApi;
 
+/**
+ * @since 1.8
+ */
 public abstract class WxaApi extends BaseApi {
 
 	private static final ResourceBundle WEIXIN_BUNDLE;
diff --git a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/package-info.java b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/package-info.java
index ac7a4ea3..4033640a 100644
--- a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/package-info.java
+++ b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/package-info.java
@@ -1 +1,4 @@
+/**
+ * @since 1.8
+ */
 package com.foxinmy.weixin4j.wxa.api;
diff --git a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/model/Session.java b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/model/Session.java
index ceeffdb5..679c7918 100644
--- a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/model/Session.java
+++ b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/model/Session.java
@@ -2,6 +2,9 @@ package com.foxinmy.weixin4j.wxa.model;
 
 import java.io.Serializable;
 
+/**
+ * @since 1.8
+ */
 public class Session implements Serializable {
 
 	private static final long serialVersionUID = 2018051801L;
diff --git a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/model/package-info.java b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/model/package-info.java
index bcb61d30..e12e627b 100644
--- a/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/model/package-info.java
+++ b/weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/model/package-info.java
@@ -1 +1,4 @@
+/**
+ * @since 1.8
+ */
 package com.foxinmy.weixin4j.wxa.model;