170。 Official website of Jining Social Security Bureau shows that the social security payment base of this city is 1993. Social insurance refers to the institutional arrangement that the state raises funds through various channels such as legislation according to the principle of corresponding rights and obligations, and provides material help (including cash subsidies and services) to the insured when they encounter risks such as old age, illness, work injury, unemployment and maternity, so that they can enjoy basic living security and avoid or reduce economic losses.