The Wu family style t'ai chi ch'uan (Taijiquan) of Wu Quanyou and Wu Chien-ch'uan (Wu Jianquan) is the second most popular form of t'ai chi ch'uan in the world today, after the Yang style, and fourth in terms of family seniority. This style is different from the Wu style of t'ai chi ch'uan (武氏) founded by Wu Yu-hsiang. While the names are distinct in pronunciation and the Chinese characters used to write them are different, they are often romanized the same way.