Legal analysis: social pooling refers to the large-scale unified collection, management and use of social insurance funds by social insurance agencies within the territorial scope. This system adopts the traditional mode of raising basic old-age insurance expenses when raising basic old-age insurance funds. That is, the state, units and individuals share the burden; The basic old-age insurance fund implements social mutual aid; In the calculation and payment of basic pension, the structural calculation and payment method is adopted, emphasizing the incentive factors and labor contribution differences of personal account pension. The basic old-age insurance is enforced by the state, and its purpose is to protect the basic needs of retirees. To sum up, if social security is integrated, there is a unified collection and management by the organization, and then it is used. Social insurance is stipulated by the state to protect the life of retirees.

Legal basis: 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 58 An employing unit shall, within 30 days from the date of employment, apply to the social insurance agency for social insurance registration for its employees. If the social insurance has not been registered, the social insurance agency shall verify the social insurance premium it should pay. Employees-free individual industrial and commercial households who voluntarily participate in social insurance, part-time employees who do not participate in social insurance in the employing unit and other flexible employees shall apply to the social insurance agency for social insurance registration. The state establishes a national unified personal social security number. Personal social security number is a citizen's identity number.