National varieties refer to the drug varieties involved in China's national medical insurance negotiations. National medical insurance negotiation is an important policy in China's medical insurance system. Through drug price negotiation, the purpose of reducing patients' drug burden and improving the efficiency of medical insurance fund is achieved. National varieties mainly include innovative drugs and specific drugs for treating major diseases, rare diseases, children and other diseases. Because these drugs are often expensive and the burden on patients is heavy, through national medical insurance negotiations, the price of drugs can be effectively reduced and more patients can benefit. Therefore, the national drug varieties are involved in the national medical insurance negotiations, and their purpose is to reduce the drug burden of patients and improve the efficiency of the use of medical insurance funds.