I have a Chuwi minibook, similar form factor. I'm on my third battery, which has convinced me to avoid this sort of niche but poorly supported device in the future.
Where did you buy the Chuwi minibook? I have only seen some videos online, but AliExpress doesn't seem to list any sellers.
I'm researching the Chuwi minibook now and amazon.co.jp sells an japanese quality tested version "FFF UMPC FFF-PCM2B". Also in Japan, Donki Hote is selling a similar device called NANOTE NEXT (7inch, 8GB RAM, 64GB SSD). Both are at a similar price point. I'd also like to namedrop panasonic let's note (bigger form factor)