 Huang then headed toward Xuanwu's capital Bian Prefecture (汴州) and put it under siege.Zhu sought emergency aid from Li Keyong, and Li Keyong immediately headed toward Bian, catching Huang about to cross the Yellow River at Wangman Crossing (王滿渡, in modern Zhengzhou, Henan) and crushing his army.Shang surrendered to Shi, while a large number of Huang's other generals surrendered to Zhu.