Legal basis: Article 49 of the Labor Contract Law of People's Republic of China (PRC), the state takes measures to establish and improve the system of trans-regional transfer and connection of workers' social insurance relations. Article 50 When the employer dissolves or terminates the labor contract, it shall issue a certificate of dissolution or termination of the labor contract, and go through the formalities for the transfer of the file and social insurance relationship for the employee within 15 days. Laborers shall handle the work handover according to the agreement of both parties. If the employing unit should pay economic compensation to the workers in accordance with the relevant provisions of this law, it should pay it when the work handover is completed. The employing unit shall keep the text of the dissolved or terminated labor contract for at least two years for future reference.