How does WeChat set a password lock to prevent others from opening it?

Just turn on the application lock function of WeChat. Let me demonstrate the detailed operation steps below? (ゝω)

(Mobile phone model: Huawei P30)

1. Find "Settings" on the phone desktop and click Open.

2. After entering the new page, click "Safe" to enter.

3. After entering a new page, click "Apply Lock" to enter.

4. Enter the screen lock password and enter the application lock.

5. Turn on the switch behind WeChat.

6. When you open WeChat again, you must enter a password to enter WeChat.

The above is a tutorial for WeChat to set a password lock to prevent others from opening it. Why not try what you have learned? *? (ˊ? ˋ*)? *?