diff --git a/server/controller/qyweixin.go b/server/controller/qyweixin.go
index cbd5469..631a40e 100644
--- a/server/controller/qyweixin.go
+++ b/server/controller/qyweixin.go
@@ -56,7 +56,7 @@ func (q *QyWeixin) Pay(ctx *gin.Context) {
 
 	// 支付费用
 	var req qyweixin.PayReq
-	req.BillNo = fmt.Sprintf("API%s_%s", time.Now().Format("20060102150405"), userid)
+	req.BillNo = fmt.Sprintf("API%s%s", time.Now().Format("20060102150405"), userid)
 	req.Title = title
 	req.Openid = openid
 	req.TotalAmount = amount