diff --git a/internal/biz/cmb/cmb.go b/internal/biz/cmb/cmb.go
index e881eae..6cce3b8 100644
--- a/internal/biz/cmb/cmb.go
+++ b/internal/biz/cmb/cmb.go
@@ -8,6 +8,9 @@ import (
 	"voucher/internal/data"
 )
 
+// Cmb .
+// @link https://open.cmbchina.com/Platform/#/resource/document/approvalAPI
+// @link https://open.cmbchina.com/Platform/#/resource/document/guide
 type Cmb struct {
 	bc              *conf.Bootstrap
 	rdb             *data.Rdb
diff --git a/internal/data/wechatrepoimpl/cpn.go b/internal/data/wechatrepoimpl/cpn.go
index 48c9d29..6ff2860 100644
--- a/internal/data/wechatrepoimpl/cpn.go
+++ b/internal/data/wechatrepoimpl/cpn.go
@@ -18,6 +18,8 @@ import (
 	"voucher/internal/pkg/request"
 )
 
+// CpnRepoImpl .
+// @link https://pay.weixin.qq.com/doc/v3/merchant/4012463767
 type CpnRepoImpl struct {
 	bc     *conf.Bootstrap
 	Server data.Server