diff --git a/library/payclients/alipaycli/client.go b/library/payclients/alipaycli/client.go
index ee2a368a..3212bbd4 100644
--- a/library/payclients/alipaycli/client.go
+++ b/library/payclients/alipaycli/client.go
@@ -27,8 +27,8 @@ const (
 var allAlipayClients = map[string]*AlipayClient{}
 
 func GetDefaultAlipayClient() *AlipayClient {
-	rate := rand.Intn(1000)
-	if rate < 980 {
+	rate := rand.Intn(20)
+	if rate < 19 {
 		return allAlipayClients[AppIdMiYuanTianShi]
 	}
 	return allAlipayClients[AppIdLanXing01]