Complex sentence: In 1850, Yang was hired by the Imperial family to teach tai chi chuan to them and several of their élite Manchu Imperial Guards Brigade units in Beijing's Forbidden City, in whose number was Yang's best known non-family student, Wu Ch'uan-yü.
Split into simpler sentences: In 1850, Yang was hired by the Imperial family to teach Taijiquan to them and several of their élite Manchu Imperial Guards Brigade units in Beijing's Forbidden City. Among this group was Yang's best known non-family student, Wu Ch'uan-yü.