Vrsumo2017 I tried several times last year and it didn't work.
The version of the Chinese PICO OS must be low, but even if I do a factory reset, the version of PICO OS will not return and it was difficult to find the timing to install it.
Even if it succeeds temporarily, it will be returned to the Chinese version when updating PICO OS.
I will wait a little longer and try again if there is no solution.