Is it legal for Shandong trade unions to pay social security?

Social security payment is the main content of social security service, which refers to a service that social security agencies handle and pay social insurance for enterprises or freelancers who need to provide social security payment services. Social security payment is one of the many services provided by personnel agencies. As an intermediary service, social security intermediary has attracted more and more social attention and become an industry with the implementation of relevant supporting policies in various places.