Chinese companies have historically violated bans on making banned gasses, but other countries have detected this. After that, the Chinese government has actually cracked down on them and eliminated those emissions. They worked with international groups to find the violators and then raided and even demolished illegal factories: https://www.climatechangenews.com/2021/02/10/study-suggests-...

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.