How does Huawei enjoy 9s and reply to WeChat messages while playing games?

The scheme for open that floating window in the game is as follow:

1. You can enter the settings and search for the application assistant;

2. After entering the application assistant, click the game space to add a game application to the game space;

3. After adding, enter the game again. You can select WeChat in the icon in the upper left corner and chat with the floating window.