$ git clone git@github.com:UnityTech/ConnectAppCN.git
$ cd ConnectAppCN/
$ git submodule init
$ git submodule update

1. open the Unity Editor, find Assets/ConnectApp/canvas folder in Project Tab.
2. double click the ConnectApp.unity for preview the project.
3. double click the ConnectAppCanvas.cs evoke Rider for Edit Code.
4. Unity Menu Flie -> Build Settings -> Switch Platform iOS or Android.
5. Click Play button run project in Editor.

PS: if "Game" window show "No cameras rendering" Toast, You can click the menu in the upper right corner of the "Game" window and uncheck the "Warn if No cameras rendering" option to make it disappear.

Any questions can be raised in the issue, we will reply as soon as possible.