How to set the background operation of red rice mobile phone?

1. Take Red Rice 5 as an example, open the mobile phone housekeeper in the mobile phone, and then click "99% Power" in the page:

2. After entering the power page, click the Settings icon in the upper right corner, as shown below:

3. Then find "Lock the screen and clear the memory" in the page, and you can see that "Never" is currently selected, so that the background application will not be cleaned after the screen is locked:

4. If you need to clean up the background program, you can choose other options, so that you can clean up the background regularly according to the selection: