The university has the largest affiliated hospital system in China,[16] including Sun Yat-sen University First Hospital, Sun Yat-sen Memorial Hospital (or Sun Yat-sen University Second Hospital), Sun Yat-sen University Third Hospital, Sun Yat-sen University Fourth Hospital (has merged into the First Hospital), Sun Yat-sen University Fifth Hospital (or Zhuhai Hospital), Sun Yat-sen University Sixth Hospital (or Sun Yat-sen University Gastrointestinal & Anal Hospital), Sun Yat-sen University Cancer Center, Sun Yat-sen University Stomatologic Hospital, Sun Yat-sen University Ophthalmologic Center, Sun Yat-sen University Seventh Hospital (Shenzhen), Sun Yat-sen University Eighth Hospital (Shenzhen). All eight general hospitals, the Sun Yat-sen University Cancer Center and Sun Yat-sen University Ophthalmology Center are 3A class hospitals.