Huawei's information notification bar (floating window) can only last for a few seconds. How to preserve it for a long time?

Other brands of mobile phones do the same. It's not the phone. Now mobile phones are all smart phones, and the time is network time. The setting of the operator should have nothing to do with the mobile phone. Do not save any settings, it is also electronic time. As long as you turn on your mobile phone, it will automatically display the time through the network. And as long as the mobile phone has electricity and no network after it is turned on, the time will run normally. Unlike Huawei's mobile phones, my other brands of mobile phones do the same. It's not the phone. Now mobile phones are all smart phones, and the time is network time. The setting of the operator should have nothing to do with the mobile phone. Do not save any settings, it is also electronic time. As long as you turn on your mobile phone, it will automatically display the time through the network. And as long as the mobile phone has electricity and no network after it is turned on, the time will run normally.