When did Sichuan social security begin to be paid?

According to the French Open, workers in Chengdu, Sichuan began to pay social security from 1999. Social security payment methods are divided into individual payment and unit payment. According to the provisions of Article 83 of the Social Insurance Law of People's Republic of China (PRC), if an employer or individual thinks that the behavior of a social insurance fee collection agency infringes upon its legitimate rights and interests, it may apply for administrative reconsideration or bring an administrative lawsuit according to law. The employing unit or individual may apply for administrative reconsideration or bring an administrative lawsuit against the social insurance agency for failing to register social insurance, verify social insurance premiums, pay social insurance benefits, handle social insurance transfer and connection procedures or infringe upon other social insurance rights and interests according to law.