The insured of the basic old-age insurance for urban and rural residents can pay before the end of April, and declare the individual payment grade at the county (district) social security bureau, town-level public service platform and cooperative bank window. In 2020, the payment of the basic old-age insurance for urban and rural residents will start from May 1, and the insured will pay the basic old-age insurance for urban and rural residents from May 1 to May every month. Article 72 of the Labor Law of People's Republic of China (PRC) stipulates that the social insurance fund shall determine the source of funds according to the types of insurance, and gradually implement social pooling. Employers and workers must participate in social insurance and pay social insurance premiums according to law.