Why didn't Huawei receive WeChat message after glory 6x locked the screen?

First, I believe everyone knows, setting up, wireless and network, and more, turn on the mobile network and choose to always connect to the data network.

Second, the protected background application, select the software that needs to be run after the screen is locked.

Third, find QQ and WeChat in the setting and notification center. After opening, open the priority display, that is, select all.