In a Weibo from Chuwi the official Hi10 keyboard dock is now up for pre-order. Chuwi commented that it moves from zero to 120 degrees from closed to open, so similar to the Asus Transformer Book series of keyboards.
I’m still waiting for my Hi10 and hopefully, I’ll have it in a week or so. I do have the keyboard ordered to review, so this explains the delay on the keyboard, it’s not even out yet!