Update README.md

README.md

@@ -45,6 +45,13 @@ $easySms = new EasySms($config);
 $easySms->gateway('error-log')->send(19188888888, 'hello world!');
 ```
 
+# Gateways
+
+- [YunPian](https://github.com/overtrue/easy-sms/wiki/GateWays---YunPian)
+- [Submail](https://github.com/overtrue/easy-sms/wiki/GateWays---Submail)
+- Todo
+
+
 # License
 
 MIT