When did Liaoning Province begin to implement the Social Security Year?

See 1 April 9991opinions on the reform of medical insurance system for urban workers in Liaoning province: in order to actively and steadily promote the reform of medical insurance system for urban workers, accelerate the establishment of basic medical insurance system for urban workers, and promote the construction of social security system in Liaoning province,

Social security, called social insurance, is a redistribution system, and its goal is to ensure the reproduction of material and labor and social stability. Social security, which we often say, has another name, and "five insurances and one gold".