A poor app made by a makeshift team
Why don't you delete Simplified Chinese from the language list? As long as the phone language is set to Simplified Chinese, the App will automatically jump to the Amazon China region, resulting in an inability to log in. The current situation is that the phone has installed the Amazon China region special App to log in to the Amazon China region, and then installed this global version, the login also points to the China region, but can neither log in to the China region nor other regions. You are really a bunch of makeshift teams, it's terrible!