Don't know if there is a difference between models bought in China and those bought abroad.
However, I can't seem to find Boox Tab X on amazon.ca. It is available on amazon.com, but then there are shipping fees to Canada:
https://www.amazon.com/BOOX-Tab-ePap...ef_=ast_sto_dp
Personally, even though I live in Canada, I have bought all my Boox ereaders from
ereader.store in Germany. I highly recommend them if the device is not on amazon.ca.
https://ereader.store/en/13-3-inch-screen-reader-18
Just be aware that, if bought on Amazon, the Tab X apparently does not come with a cover. If bought from
ereader.store, the cover is included. That is something which you may also want to look into if you are having your mother buy the device for you in China.