Chenggong Ying was from Jincheng Commandery (金城郡), which is around present-day Yuzhong County, Gansu.
As Han Sui fled after the defeat, many of his men abandoned him but Chenggong Ying remained loyal and stayed with him.
After Yan Xing, Han Sui's son-in-law, attempted to murder him, Han Sui felt so disillusioned that he wanted to retreat to Yi Province (covering present-day Sichuan and Chongqing) and take shelter under the warlord Liu Bei, a rival of Cao Cao.
However, Chenggong Ying strongly objected as he felt that Han Sui should not simply abandon the power base he had built up over the years and become a vassal of another warlord.
Chenggong Ying knelt down and replied, "In all honesty, if Han Sui were still alive today, I wouldn't be here with you."