So… I bought this USB quickcharge 2/3/PE (8€) and connected with the Chuwi USB-c cable to a Quick Charge 2.0 AUKEY 3-Port USB Wall Charger (15€) (I already had it at home), pressed twice to change from 5v to 12.2v and… It works!!!
The USB adaptor show 1.82A and 12.2V, so it means 22 Watts. I think it is charging a bit slower than the original, but it charges whole I’m using it. Also I noticed the original charger gives a little bit electricity touching the tablet when connected but this one does not. So it seems better than the cheap chuwi’s original one.
I’m very pleased because I will not have several chargers when travelling, and AUKEY charger looks safer to me.

