Chuwi have released their official drivers pack, Windows 10 image and a bios update. There is no mention of what the bios update fixes or patch, it’s safe to assume it must be for Windows 10. The driver download includes updated drivers for Windows 10, the touch driver and camera’s now shouldn’t be an issue.
https://youtu.be/ppLQfWbhz_M
Unfortunately, there is no installer, so you have to go through each of the directories and update the drivers one by one. If you do install the Windows 10 WINRE image, note that you have licensing issues and it’s advisable to just upgrade from Windows 8.1 and then install the Win 10 drivers below.
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The Windows 10 image is here: http://pan.baidu.com/s/1dDnqFIx
Many thanks to Hans for pointing this out to me.