He is taiwanese, but he learned from Yang Chengfu.

Cheng Man-ch'ing (simplified Chinese: 郑曼青; traditional Chinese: 鄭曼青; pinyin: Zhèng Mànqīng) (July 29, 1902 - March 26, 1975) was born in Yongjia (present-day Wenzhou), Zhejiang Province (his birthday was on the 28th year of the Guangxu emperor's reign, 6th month, 25th day, which corresponds to July 29, 1902).

....Around 1930 Cheng met the well-known master Yang Chengfu (1883--1936), with whom he began to study Yang-style t'ai chi ch'uan, until Yang died. While the exact dates of Cheng's study with Yang are not clear, one of Yang's top students, scholar Chen Weiming wrote that Cheng studied six years with Yang.

....By 1946, he had developed a significantly abbreviated 37-move version of Yang's traditional form.

....Cheng moved to Taiwan in 1949.