Xiaomi mobile phone always pops up application software, how to block it?

Taking Xiaomi 6 mobile phone as an example, the specific operation includes the following steps:

First, open "Settings" on the phone desktop.

Second, open "Settings" and find "Notification and Status Bar" to enter.

3. Then click "Notification Management" to enter.

4. Then click "Apply" to proceed to the next operation.

5. Finally, click the switch button to close the "Allow Notification" to complete the operation.