WeChat Proxy has to be used in case you need to share the same App Id with multiple Applications.
Please make sure to have a good understanding about Wechat authentication usage before continue. Otherwise, please have a look at WeChat dedicated article.
WeChat Proxy is provided by a partner which has a strong experience of WeChat ecosystem digital solution.
Provide an App ID with the WeChat Secret and they will return you a secret for each of your applications with an authorization URL.
Use these two parameter to set the WeChat Proxy configuration into Cloudi-Fi Administration UI under Settings > Advanced Settings > WeChat Proxy