It's a second comment in this thread like this. I'm not a native speaker and it's hard to tell whether CCP is supposed to be: - CCCP a cyrillic of SSSR? - CCP

It's a second comment in this thread like this. I'm not a native speaker and it's hard to tell whether CCP is supposed to be: - CCCP a cyrillic of SSSR? - CCP, Chinese Communist Party? - CCP, the cyclic something peptide, which is a top websearch hit for me?