 Li Keyong thus took 50,000 soldiers and advanced south to cross the Yellow River, but had to take a roundabout route through Hezhong when Zhuge Shuang the military governor of Heyang Circuit (河陽, headquartered in modern Jiaozuo, Henan) refused to grant him passage.He eventually rendezvoused with the armies of Zhongwu, Ganhua, Xuanwu, and Taining (泰寧, headquartered in modern Jining, Shandong) Circuits and headed toward Chen Prefecture (陳州, in modern Zhoukou, Henan), whose prefect Zhao Chou had been under siege by Huang for some 300 days.In summer 884, Li Keyong defeated Shang and then Huang Chao's brother Huang Siye (黃思鄴), and Huang Chao abandoned his siege on Chen.