Legal analysis: March 8 and March 18 are the date nodes when individuals pay social security and deduct money from bank cards. Social insurance is the most important part of the social security system. Social insurance refers to a system in which the state establishes a social insurance fund by legislation, and provides necessary material assistance to workers who participate in labor relations when they lose their ability to work or are unemployed. Social insurance is not for profit. Social insurance is mainly through raising social insurance funds, and making overall adjustments to the social insurance funds within a certain range to give necessary help to workers when they encounter labor risks. Social insurance provides basic living security for workers. As long as workers meet the conditions for enjoying social insurance, that is, they have established labor relations with employers or paid various social insurance premiums according to regulations, they can enjoy social insurance benefits. Social insurance is the core content of social security system.

legal basis: social insurance law of the people's Republic of China

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 to protect citizens' right to get material help from the state and society in case of old age, illness, industrial injury, unemployment and maternity.

article 4 the people's Republic of China * * * and employers and individuals within the territory of China have the right to inquire about the 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.

article 58 individual industrial and commercial households without employees 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.