West China Medical Center of Sichuan University belongs to four key hospitals directly under the Ministry of Health, among which West China Hospital, the first affiliated hospital, is a comprehensive large hospital. The second affiliated hospital is Huaxi Women and Children Hospital. The third affiliated hospital is Huaxi Stomatological Hospital. The fourth affiliated hospital is Huaxi Occupational Disease Hospital. The business scope of the four hospitals is complementary to each other and there is almost no overlap.