diff --git a/business/auth2/auth_info.go b/business/auth2/auth_info.go
index feb647c62..7b5484fcc 100644
--- a/business/auth2/auth_info.go
+++ b/business/auth2/auth_info.go
@@ -55,12 +55,12 @@ func (u *UserBasic) IsUserEmpty() bool {
 
 type AuthBindEx struct {
 	model.AuthBind
-	UserData interface{}
-	UserHint *UserBasic
+	UserData interface{} // 认证成功后得到的原始用户信息
+	UserHint *UserBasic  // 认证成功后得到的一些可能的基本用户信息（主要有用信息是手机号，email与用户名）
 }
 
 type AuthInfo struct {
-	UserBasic
+	UserBasic    // 登录成功后保存的用户信息
 	AuthBindInfo *AuthBindEx
 
 	LoginTime time.Time
@@ -78,7 +78,7 @@ func (a *AuthInfo) GetAuthType() string {
 }
 
 func (a *AuthInfo) GetUserTag() string {
-	userTag := a.UserID2
+	userTag := a.GetID2()
 	if userTag == "" {
 		if a.AuthBindInfo.UserHint != nil {
 			userTag = a.AuthBindInfo.UserHint.Mobile