Gu Ruzhang (Mandarin) also known as Ku Yu Cheong (Cantonese)
http://ezine.kungfumagazine.com/ezine/article.php?article=157
Shaolin master by the name of Gu Ruzhang (Ku Yu Cheong) an inheritor of the Shaolin kungfu that Gan Fengchi brought out of the temple. After Wan Bengcai came Yan Degong then Yan Sansen, then Ku's uncle Yan Jiwen, then Master Ku.
Ku Yu Cheong became very famous, not only as a master of Shaolin kungfu, but specifically for his skill at Iron Palm. In 1931, he killed a Russian warhorse with a single slap. A post-mortem dissection of the horse revealed no external injury, however all of the animal's internal organs had been shattered. A famous historic photograph captured Ku smashing thirteen bricks, stacked without spacers. After his victory at Nanjing, Ku traveled to Guangzhou with four other masters of northern-style kungfu: Fu Zhensong, Li Xianwu, Wan Laimin, and Wan Laisheng. Collectively, they became known as the Wu Hu Xia Jiang Nan or the Five Southbound Tigers.
Ku had a profound effect on the development of Bak Sil Lum, so much so that some believe that the bulk of the curriculum today is based on his renovations. Not only did he study Bak Sil Lum with his uncle, he was also influenced by his father Ku Leichi (Shaolin and Tan Tuy,) Sun Lutang (Taiji,) Li Jinlin (Wudang sword,) Tan Zan (Choy Li Fut,) Yu Zhenshang (Cha style,) Zhao Shangzhou (Six harmonies,) and Du Xinyue (Ziren Men.) Ku's move to Guangzhou and his inclusion in the Five Southbound Tigers was probably the reason behind the distinction of Bak Sil Lum as 'Northern' Shaolin as well as the usage of Cantonese
