Don't you want the company to pay the social security agency a back salary?

Legal analysis: No, social insurance is compulsory by the state, and any unit or individual that establishes labor relations must participate.

Legal basis: Article 17 of People's Republic of China (PRC) Labor Contract Law shall contain the following clauses: (1) Name, domicile and legal representative or principal responsible person of the employing unit; (2) The name and address of the laborer and the number of the resident identity card or other valid identity documents; (3) The term of the labor contract; (4) Work content and work place; (five) working hours and rest and vacation; (6) Labor remuneration; (7) Social insurance; (eight) labor protection, working conditions and occupational hazard protection; (nine) other matters that should be included in the labor contract as stipulated by laws and regulations. In addition to the necessary provisions stipulated in the preceding paragraph, the employer and the employee may agree on probation, training, confidentiality, supplementary insurance and welfare benefits.