Woo

 was a nightclub owner in 1934 Shanghai. He was also the vigilante Yan Cheh. Under that identity, he tried to protect the people of the city from the corruption of local government and the Tongs. He inadvertently got caught up in Hsien-ko's plot to get revenge on Magnus Greel. After that plot was stopped, Woo decided to give up his crimefighting and only be a simple nightclub owner.

(PROSE: The Shadow of Weng-Chiang)