In Water Margin, Wu Dalang was nicknamed "Three-inch bark". According to Wang Po's bribery theory, Brother Yun got angry and made trouble in the teahouse, and his eldest brother Wu Dalang and his two children were a mother. Song Wu is eight feet long and handsome. His body is full of strength. Not to mention how to hit that tiger. This Wu Dalang is less than five feet, looks ferocious and has a ridiculous mind. People in Qinghe county saw that he was short and short, so they gave him a nickname, called "three-inch bone bark".