China's policy of responding only when they are caught is broad and applies to a wide variety of violations. The problem is, they also make it very hard to police China. This is deliberate.
The 1-2% that get caught and punished are acceptable breakage from the broader picture.
The fact that levels have fallen dramatically since this operation shows that much more than 1-2% are being caught. Not trying to defend the Chinese government as a whole, but on GHGs specifically they are doing more than many other countries to curb emissions.
Absolutely there is someone somewhere in China who has built an R-12 plant with a high end capture system for escaping volatiles and a weird ventilation system that gets past the satellite imaging.
The 1-2% that get caught and punished are acceptable breakage from the broader picture.