I have bought it by banggood.com.
they give me 2 options:
“One: you just send us the tablet back and you keep the battery, we afford half of shipping cost.
Another, we send you a new one but you need pay usUS$130 and you don’t have to send the damaged one back”.
I have sent the parcel with DHL/Deutsche Post (DHL Päckchen 2kg ca. 19€ ). It came back, because a lithium battery
was in the parcel. I can send a package with lithium battery from Germany to China (and all countries outside from EU)
only with DHL Express. Then I have to pay 120€.