几年还前见有报道，有人继续偷偷生产使用CFC-11

找了一下，网上还有：

https://www.nature.com/articles/s41586-019-1193-4

https://www.theguardian.com/world/2019/may/23/china-factories-releasing-thousands-of-tonnes-of-illegal-cfc-gases-study-finds