 This exchange continued when the Central Guoshu Institute (Central Martial Arts Academy) was founded in Nanjing.After heavy competition, Fu Chen Sung was made Chief Instructor of baguazhang, emphasizing in his teachings fast precise footwork and waist strength.It was here that he taught Sun Lu-t'ang the Wudang sword and in exchange, Sun Lu-t'ang taught him the Sun-style of Xingyiquan and T'ai chi ch'uan.