I do think anybody intending to go to China to visit a phone store when you arrive and get the kids there to assist you set up the Chinese DiDi App there. I had trouble setting mine up years ago and the kids in Apple Store got it done in seconds - it requires changing location services or something but they will know how it’s done.
Once you get it installed and setup input your CC details then just use and enjoy - you will be staggered just how good and easy it is,
Of course there will be the ‘experts’ here will say never put up a CC on a Chinese App cause they will steal all your

but dignore them and go enjoy what that amazing country has to offer