Han Sui
After Cao Cao defeated the warlords at the Battle of Tong Pass, Han Sui and his remaining followers retreated to Jincheng Commandery. As Cao Cao had heard that Yan Xing was reluctant to participate in the rebellion, he spared Yan Xing's family members who were in Xu at the time but executed the families of the other rebels. He then wrote a letter to Yan Xing to inform him that even though his family members were alive and well, the central government could not permanently provide for them. When Han Sui found out that Cao Cao had spared Yan Xing's family members, he plotted to harm them so as to force Yan Xing to remain loyal to him. He then forced Yan Xing to marry his daughter. As Han Sui expected, Cao Cao became suspicious of Yan Xing. At the time, as Han Sui had ordered Yan Xing to take charge of Xiping Commandery (西平郡; around present-day Xining, Qinghai), Yan Xing seized the opportunity to gather his followers and turn against Han Sui. However, he never managed to defeat Han Sui so he gave up and brought along his followers to join Cao Cao's side. Cao Cao enfeoffed him as a marquis. Nothing was recorded in history about Yan Xing from this point onwards.