The Guozijian , sometimes translated as the National School, National Academy, Imperial Academy, Imperial University, Imperial College, Imperial Central School, etc., was the national central institution of higher learning in Chinese dynasties after the Sui. It was the highest institution of learning in China's traditional educational system, with the function of administration of education. In Vietnam, the Imperial Academy (Vietnamese: Quốc Tử Giám) existed after the Lý dynasty. Several notable chairmans of Guozijian in Vietnam were Chu Văn An, Nguyễn Phi Khanh, Vũ Miên, and Trương Công Giai.