I cannot change my region to US/China
When I attempted to change to these countries, I have to enter an address. However, every time I tried to ‘select’ the province, the whole process automatically stop.
Question marked as
If you're having problems with the interface not working properly, contact Apple:
Refer to this document for ways to contact Apple --> Choose your country or region - Official Apple Support
Select your country (also look for "other" regions), then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.
or:
Contact Apple for support and service by telephone --> Contact Apple for support and service - Apple Support