Gu Ruzhang
Gu Ruzhang (Chinese: 顾汝章; pinyin: Gù Rǔzhāng; Cantonese Yale: Gu Yu-jeung; 1894–1952) was a Chinese martial artist who disseminated the Bak Siu Lum (Northern Shaolin) martial arts system across southern China in the early 20th century. Gu was known for his expertise in Iron Palm hand conditioning among other Chinese martial art training exercises.