Wechat client is an instant messaging application developed by Tencent, which is mainly aimed at smartphones and other mobile devices. The installation method of WeChat client is as follows:

For Android users: Open the "App Store" on your phone. Enter "WeChat" in the search field, and then select "WeChat" application in the search results. Click the Install button and wait for the download and installation to complete.

For iOS users: open the AppStore. Enter "WeChat" in the search field, and then select "WeChat" application in the search results. Click the Get button, and then you may need to verify your AppleID. Complete the download and installation.