The twelfth ancestor Wu Huan (1177-1227) served as an officer in Changsha City in the years from 1223 to 1224. During his term, he ordered his son Wu Jian (1206- 1279, Left Prime Minister in the Southern Song Dynasty) to study at Yuelu Academy, where Wu Jian’s teachers included Zhen Dexiu and Li Fan, disciples of the philosopher Zhu Xi. The Yuelu Academy was one of the four most renowned academies in the Song Dynasty.