Nokia 6 120c mobile phone has a seemingly new yellow symbol in the upper right corner. How to get rid of it?

Have you ever installed blacklist interception software such as Xinyi? If there is, that small envelope will probably intercept the information. I installed a letter, and I will prompt you when interception happens, such as intercepting unwanted calls, ringing incoming calls, spam messages and so on. The tip is that there is a small white envelope flashing in the upper left corner.

In addition, I also know that the pushmail mobile phone client of China Mobile's 139 mailbox will display a pale yellow envelope in the upper right corner of the mobile phone desktop when it receives a new email from your 139 mailbox, so you only need to visit the pushmail client in the mobile phone to read it, or the new email mark in the mobile phone will disappear after the computer accesses the 139 mailbox to read the email.