

I don’t think that number is surprising. Living in China e.g. 40 years ago would have sucked, so as mentioned in the article you posted, living conditions have basically continuously improved for people. I expect that number will drop in the upcoming decades (although IDK to what extent). It’s worth noting the studies were basically pre-COVID.
Also, pointing out that China has other political parties is worthless since they basically can’t do anything.
Them’s fightin’ words