Legal basis: Article 59 of the Law of People's Republic of China (PRC) on Basic Medical Care and Health Promotion, the state implements the system of essential drugs, and selects an appropriate number of essential drugs to meet the demand for essential drugs for disease prevention and treatment. The state publishes the list of essential drugs, and adjusts the list of essential drugs according to the clinical application practice of drugs, changes in drug standards and the dynamics of newly listed drugs. Essential drugs are given priority in the list of basic medical insurance drugs according to regulations. The state improves the supply capacity of essential drugs, strengthens the quality supervision of essential drugs, and ensures the fair, accessible and rational use of essential drugs.