Why can’t I receive WeChat messages after my phone’s screen goes black?

The phone has activated the sleep and disconnection function, resulting in no traffic signal when the screen is turned off. The solution is as follows:

Device: Huawei mate30 pro 5G

System: Android Android 10

Software: WeChat v8.0.2

No. Step 1: Enter the phone settings and click "Battery" in the settings, as shown in the picture below.

The second step is to click "More Battery Settings" in the battery, as shown in the picture below.

The third step is to check whether the "Always maintain network connection during sleep" slider in more battery settings is turned on, as shown in the figure below.

Step 4. If the slider is closed, the message will not be received after the screen is locked for a long time, as shown in the figure below.

The fifth step is to turn on the slider of "Keep network connection during sleep", as shown in the figure below.