[3] Due to his abilities in Pushing Hands and demonstrations of his Neigong (he used to invite well known boxers to punch him just to show he received the punches unimpressed and relaxed) he became famous in Guangzhou, Singapore and Malaysia, where he established schools with Wu Jianquan's son, Wu Gongyi (吴公儀, 1900–1970).
From 1948 to 1952, Cheng taught Wu’s Taiji at the South China Sports Association in Hong Kong.
[1] Some martial artists in Cheng's lineage, especially those who learned from his disciple Woo Hsing teach this.
Cheng had learned Qigong/Neigong in several lineages of Alchemy before meeting Wu and had written a book on the old stationary forms of Yijinjing and Xianjia Baduanjin.
[7] Notable disciples include his eldest son Cheng Pui Ki (1927-2004), nephew Woo Hsing / Wu Sing, Cheng Tin Hung/Zheng Tianxiong/鄭天熊 (1930–2005), Tang Mong Hun/Menghen Deng/鄧夢痕, Tsang Kim Chau, Liu Kang Chee, Cheung Yiu Keung, Sim Tai Chen/Shen Da Zhen/沈大正, Ma Tin Yik, Leong Fong, and Liu Kwong Sum.