 When Huangfu and Dong reached Chencang, Dong urged Huangfu to relief the siege immediately.Huangfu, however, had a different opinion – he argued that Chencang's strong defences would not be easily captured and they would only need to wait for Wang Guo's men to become discouraged.Sure enough, Wang Guo's men laid siege to Chencang for more than eighty days with no success.