In these cases I'm always reminded of an Obama speech he made shortly after the beginning of the Edward Snowden disclosures, where he guaranteed in national television that the US did not spy on national citizens. Imagine that, not being a national citizen, but from an allied country, and being told point blank that you are a-okay for spying without any kind of shame. AFAIK China does not intercept all of my country'…
Well I think that's a brash assumption.
Without Snowden, we wouldn't have known about the extent of US surveillance.
A "Chinese Snowden" would not have their revelations accessible to China via their great-firewalled internet or state-run news, nor would the chilling effects of their Orwellian surveillance state likely produce such a person to begin with.