The state shall conduct on-site supervision and inspection of provincial medical institutions without notice. According to the inquiry of Guangdong Medical Insurance Bureau, the flight inspection of medical insurance fund refers to the on-site supervision and inspection organized and implemented by the national and provincial medical insurance administrative departments without informing the designated medical institutions, medical insurance agencies and institutions undertaking medical insurance business in advance. The National Medical Insurance Bureau began to explore the establishment of flight inspection mechanism in 20 19, and organized flight inspection teams 180 people in four years. 380 designated medical institutions were randomly selected, 150, and it was found that the inspected institutions were suspected of illegally using the medical insurance fund for more than 4.3 billion yuan, which achieved positive results in deterring illegal acts and recovering fund losses.