When was the last time you visited China?
Android phones may be a bit less infected by google spyware in China than they are in the west, but they do not count as “free” either. To put in mildly, Chinese people have much worse problems than being banned from instaling VPN on their phones.
There, courtesy of your friendly hacker’s congress:
and, on top of that, China is evolving very fast. For example, according to Chinese people I know, it has become almost impossible to buy anything without paying with a smartphone in Shanghai. alipay has a de-facto monopoly.