Huawei's weather clock is an hour fast. The time is set and the time zone is set, but it still can't be changed. What happened?

I happened to meet this problem and solved it decisively. First, there are four cities in the mobile phone, Beijing, Shanghai and Guangzhou. I forget which one is there. You can delete them one by one and then add new cities. Then you can decisively add your city. Of course, I didn't find my place. I just added it.