202 1 erjian is only affiliated and does not pay social security.

Whether the second-level construction engineer needs to pay social security for registration depends on the specific registration requirements of the province where the affiliated unit is located. Because the provincial construction departments have different requirements for the necessary conditions for the registration of construction engineers, the regulations are different. The Construction Committee clearly stipulates that to register a second-class construction engineer, it is necessary to provide the social security certificate paid by the employer of the construction engineer before applying for registration.

People's Republic of China (PRC) social insurance law

Article 2 The state establishes social insurance systems such as basic old-age insurance, basic medical insurance, industrial injury insurance, unemployment insurance and maternity insurance, so as to guarantee citizens' right to receive material assistance from the state and society in accordance with the law in case of old age, illness, industrial injury, unemployment and maternity.

Article 3 The social insurance system adheres to the principles of wide coverage, basic protection, multi-level and sustainability, and the level of social insurance should be compatible with the level of economic and social development.

Article 4 Employers and individuals who pay social insurance premiums according to law in People's Republic of China (PRC) have the right to inquire about payment records and personal rights and interests records, and ask social insurance agencies to provide social insurance consultation and other related services. Individuals enjoy social insurance benefits according to law and have the right to supervise the payment of their own units.