Tik Tok recorded what was on the screen. This requires the use of the screen recording function of the mobile phone. The specific operation process is as follows:

1. Take Huawei Glory 7 as an example, find the "status bar" on the desktop, hold it down and slide it down to pull out the shortcut menu bar.

2. In the shortcut menu bar, find the shortcut key of "Screen Recording" and click to enter the next step.

3. On the pop-up audio page, select the option of "System Plays Sound" and click to enter the next step.

4. At this point, the screen recording entered the countdown, and the screen recording was fully prepared.

5. Finally, if you need to turn off the screen recording, click the "Stop" option in the upper left corner to stop the screen recording and save the recorded video to your mobile phone.