Yu Jin (in Chinese: 于禁) is a character in the 14th-century Chinese classic novel Romance of the Three Kingdoms by the late Luo Guanzhong, and its multiple adaptations. He is one of the generals of Cao Cao.
Yu Jin was from Juping in Shandong today. He first joined the government forces of Yanzhou against the uprising of the Yellow Turbans. When Cao Cao across Yanzhou, Yu Jin submitted to him and was subordinated to General Wang Lang. He was so impressed by his talent that he suggested Yu Jin to his master as commander. Yu Jin played a key role in the campaigns against Tao Qian in Xuzhou, Lu Bu in Puyang and against the remaining troops of the Yellow Turbans. Later on, Yu Jin followed Cao Cao to Wan Castle and Zhang Xiu surrendered. Immediately after Zhang Xiu's rebellion, Cao Cao's camp is attacked by the Zhang Xiu forces and it was too late to retreat. Only Yu Jin is under the restraint and fights back, although some soldiers died in battle, Yu Jin was not allowed to be scattered.
He had not returned to the Wei army base camp, Yu Jin found ten injured soldiers on the way, the Qingzhou armies were robbing the family. Qingzhou armies consisted of Yellow Turban rebels and later surrendered to Cao Cao. Cao Cao is very tolerant to them, so they often arrogant and take the opportunity to rob. Yu Jin needs to listened them, he recovered these Qingzhou soldiers who were also their own. Some Qingzhou soldiers lost, fled back to the Cao camp to make a small report and told Yu Jin to rebel. Some people advised Yu Jin to report to Cao Cao first, Yu Jin built a trench to prevent the enemy from attacking and Cao Cao was informed and explained to him, he was very satisfied with the leadership qualities of his general. After Cao Cao's defeated Yuan Shao at the Battle of Guandu, Yu Jin has became deputy general.
At first, he defeated the rebellion of local warlord Chang Xi several years later, but allowed him to escape because of their friendship. Guan Yu besilled Cao Ren in the Fan Castle, Yu Jin should bring him replacement troops with Pang De, Guan Yu's tactic of stemming the Han River and diverting it to the castle forced them to retreat, they were overtaken by Guan Yu and Yu Jin surrendered to him, Pang De later executed, Cao Cao was unhappy with Yu Jin. Sun Quan, the emperor of Wu, retained Yu Jin when he defeated Guan Yu in the same year. After Cao Cao dies, Yu Jin return to the Wei (under Cao Pi), Yu Jin was to travel to Ye to honor Cao Cao at his grave. There he found artists who painted scenes from the Battle of the Fan Castle on the walls, Yu Jin submits to the victorious Guan Yu, but he died of illness.
- He is a playable character in the Dynasty Warriors series.