Also CHUWI hi10 XR is laggy in usual windows tasks, like switching between startscreen and explorer. Really noticeable frame drops in transient animations. Win installation and picking language/keyboard is like 15fps when scrolling.
Cant believe its slower than "lenovo miix 2 8"(intel atom, pretty old one).

is the keyboard of Hi10 Air compatible with this?

I wouldn't consider the USB C charging a pro because it is proprietary.  It doesn't conform to USB PD, qualcomm QC, or any other charging protocol.  If you want carry one charger for your phone and this tablet you can't because the charging is proprietary.  The charger puts out a constant 12V which makes it problematic for people who may not know that and try to use it with a device that can't handle 12V potentially damaging other USB devices.  And when searching for the part number on the charger it leads nowhere.

Then there is the keyboard if you put it into the stowed position (i.e. flipped around so the display is visible and keyboard is hidden when closed) it stays in laptop mode so you have to tap the keyboard icon in the task bar to bring up the soft keyboard after you tap on a text field rather than it coming up automatically when tapping on a text field.  Power is still going to the USB hub in the keyboard even though putting it in this postion makes it non-functional, this includes the USB A ports.  It becomes a completely non-functional keyboard and USB hub still sucking power from the battery.  You can actually see this issue as a USB error in device manager.

The drivers were barely touched on in the review, they are all just generic, so the touchpad can do gestures but you can't turn them off because of that.  In fact all of the drivers are generic.  The drivers are examples as delivered from the component manufacturer.  So, the inf files still have "ToDo" comments in them, or "put the name of your company here" comments.  And then the fact that Chuwi hosts them on mediafire rather than on their own systems makes it a bit sketchy.

Basically Chuwi is delivering average to good hardware, mostly, completely let down by the lack of testing and software (driver) integration to get all working together well.

If it was 4600U instead of Celeron, I would buy one.

Bravo for 16:10 and PWM flicker free.