diff --git a/md/join_bank_card_pay.go b/md/join_bank_card_pay.go
new file mode 100644
index 0000000..4971859
--- /dev/null
+++ b/md/join_bank_card_pay.go
@@ -0,0 +1,11 @@
+package md
+
+type JoinBankCardPayCallBack struct {
+	BizCode  string `json:"biz_code"`
+	BizMsg   string `json:"biz_msg"`
+	Data     string `json:"data"`
+	MchNo    string `json:"mch_no"`
+	RandStr  string `json:"rand_str"`
+	Sign     string `json:"sign"`
+	SignType string `json:"sign_type"`
+}