Can I receive the message without opening the WeChat trumpet?

You can receive it, but it's not a real-time message.

Turn on the phone, find the "gear" icon, and click to enter "Settings". After entering Settings, find the option of "Applications and Permissions" in the drop-down menu, click to enter the option of "Application Management", click to enter the option of "Application Management", find "WeChat" in the drop-down menu, and click to open "WeChat" in the pop-up interface. Find the option of "single permission setting" in the pop-up interface, click to enter this option, and turn on the switch of "self-start" permission, which controls whether WeChat can automatically start running and keep running in the background for receiving.