Zhang Ci (died c. 386), originally named Gong Ci, was a Chinese military general of Former Qin during the Sixteen Kingdoms period. He was the adopted son of the warlord Zhang Ping and fought during his father's war against Former Qin in 358. After he was captured in battle, Zhang Ci served Qin's ruler Fu Jian, participating in his campaigns against Former Yan, Dai and the Jin dynasty until his presumed death in 386 while serving Fu Pi. He and Deng Qiang were known as the "Enemies of Ten Thousands (萬人敵)", a title previously held by the generals Guan Yu and Zhang Fei during the end of the Han dynasty. His name can be rendered as Zhang Hao. Service under Zhang Ping Early life and background Zhang Ci was born into a family named Gong (弓) in Xuanshi county (泫氏; in modern-day Jincheng, Shanxi), Shangdang. He was said to be exceptionally strong, being able to move an ox while walking backwards and scaling walls, high or low. His adoptive father, Zhang Ping was the Inspector of Bingzhou during the time of Later Zhao but became an independent warlord following the state's swift decline in 351. Zhang Ping had adopted Zhang Ci as his son due to his abilities and greatly appreciated him. However, on one occasion, Zhang Ci fell in love with one of Zhang Ping's concubine, and the two started an affair. Zhang Ping soon found out and severely reprimanded him for this. Zhang Ci felt shame and voluntarily castrated himself to become a eunuch in order to prevent himself from doing such a thing ever again. War with Former Qin By 357, Zhang Ping was the strongest warlord in northern China and was seeking to establish his state to compete with Former Qin and Former Yan. On the winter of that year, Ping rebelled against his vassal lord, Qin, and invaded their territory. Fu Jian led a campaign against the warlord and fought him at Fenshang the following year. There, Fu Jian sent out Deng Qiang to lead the vanguard and attack Zhang Ping. In response, Ping ordered Zhang Ci to fight back. Zhang Ci and Deng Qiang battled back and forth for ten days, but neither could take the upper hand. After Fu Jian reached Tongbi (銅壁, in modern-day Tongchuan, Shaanxi) in March, Zhang Ping led his entire army against him. At Tongbi, Zhang Ci charged into