Watch can't receive reminder

If it is an Android phone, please follow the steps below:
1. You need to turn on the message reminder notification function in the black app and turn on the notification switch of the corresponding app
2. You need to open the notification authority according to the guidance, and select the relevant authority as [always allow]
3. It is necessary to keep the watch and mobile phone Bluetooth connected. The notification function of Android mobile phone needs to keep the black plus app running continuously in the background, and set the "background operation" as required
5. When the do not disturb mode is turned on, the message is not reminded and does not vibrate
6. Please try to unbind the watch, uninstall the app, rebind and enable all permissions according to the guidance prompt