Well… I’ve just received my copper plates yesterday, at about same time @Cervantez posted… anyway I tried myself swapping the Gelid pad with a 1.5x1.5x 0.8mm copper sheet and… 
I think that the real solution is that, print a new cover with room enough to fit a 60x60x1cm fan connected to the 5v vía usb or a silent 12v (Noctua, for example), to the mainboard pins, and disable that thing that CHUWI says that i’ts a fan. (that’s a nightmare CHUWI, not a fan! dammit)
The thing is that either the amount of copper is not enough, the fan is rubbish, and 55ºC is way low setting for this machine to ramp up the “fan”, if only could be changed to 65 ot 70…
Finally, CHUWI please! make a new bios with comprehensive-really working settings!
Cheers.