What does it mean to hang the certificate and cooperate with social security?

Social security affiliation refers to the illegal behavior that the company does not pay social security for it for personal reasons (freelancer, no unit, etc.). ) and want to buy social security, let an institution (a company specializing in social security) handle social security on its behalf and buy social security in a subsidiary. According to the relevant provisions of China's labor law and social insurance, employers should pay social insurance for employees after establishing labor relations. The so-called "affiliated units" do not have labor relations with individuals without units, and they are suspected of forging labor relations, which endangers the security of social security funds to some extent.