What is the main body of social insurance in China at present?

Social insurance is divided into three types: endowment insurance, unemployment insurance and medical insurance, which are respectively undertaken by the Social Insurance Bureau for Employees, the Employment Service Administration and the Medical Insurance Center. Therefore, the main body of its operation is the above three departments. The Labor and Social Security Bureau is the administrative department of the above three departments, and it is the guidance and supervision institution. The specific insurance operations are operated by the above-mentioned full-time departments.