Thanks, I have downloaded intel phone flash tool 188.8.131.52, the current intel one.
I use your tutorial "How to flash Android OS for chuwi Hi12(dualboot) step by step
with your official "Chuwi Hi12 Android OS (Dual OS)".
At the end, phone flash tool say: flash success, duration 3mn 25s.
So before this android flash, windows10 worked correctly, but not android.
Now, I have no windows 10, no android, only a black screen with DNX FASTBOOT MODE.
Restarting a couple of time with no changing at all !!
What can I do now ?