I cannot translate but does it contain the serial number? If so, you can check the warranty here:
Check Your Service and Support Coverage - Apple Support
A couple pieces of advice, if I may. AirPods can only be paired to one Apple account at a time. The original owner should have gone thru these steps before offering them for sale. If you cannot verify they did, do not purchase them. You will not be able to pair them to your Apple account.
Before you sell, give away, return, or recycle your AirPods - Apple Support
Finally, see the advice in this article, too.
The All Too Common SAD Reality of Buying … - Apple Community