Trust me - there is VERY SIMPLY way to make sound work on re-installed Windows 10 (recover drivers)
- Download original CHUWI Gemibook Pro drivers set (check forum for links)
- Go to INTEL site and download Graphic (yes-yes! Its integrated with sound) driver: Search - Intel.com
Exactly this one works for 5100 CPU: “Intel® 7th-10th Gen Processor Graphics - Windows*”
Then install it (“repair”) and re-boot laptop.
After this check device manager and manually update drivers from previously downloaded original drivers set (see point 1)
Enjoy!