chuwi hi9 air crash graphic freezes

I have problems with my device. It freezes when using after a few minutes. A restart does not help.
How can that be done? Is it a software error or is the hardware broken?
Here I have a Youtube video showing what happens.


I’m sorry to see that,please try to contact, our service department will help you out with this issue. Sorry for the inconveniences caused.

Thank you for your apology. I will contact the service, but would be glad to receive feedback from other users with possible solutions.
Best regards