Your warranty is invalid without an official registration stamp.
您的保固书没盖官方注册章所以无效。
And they can change without modifying their official registration.
而且更改区号也不需要同时更改在官方的登记。
It's not that difficult; you just open the official registration website and follow the instructions.
报名不是那么难的，你只需打开官方报名网站并按照提示去做就行。
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