Wu Collection, Lower Volume Radical: Cave (xué) Wu Kangxi stroke count: 16 Page 868, Entry 04 Jade Chapters (Yupian): Pronounced gu (falling tone). Broad Refinements (Guangya): Wu is called a stove. Cangjie Chapter (Cangjiepian): People of the Chu state call a stove wu. Also written as. This is identical to.