That’s fantastic work @Pluto!
I’m not really of much help, but regarding the co-ordinate inaccuracies, it may pay to be aware of this if you aren’t already: YouTube - Why Every Map of China is Just Slightly Wrong
Regarding the closed locations, I noticed that some Chinese locations started appearing on the “missing tesla sites (we have it Tesla does not)” table on the Comparison tab some time ago (back when Chinese locations were still coming to sc.info from the Tesla feed). I didn’t follow it up since we didn’t have people on the ground who could confirm.