韩世忠
In 1137, Emperor Xizong abolished the Qi kingdom, a vassal state of the Jin dynasty ruled by Liu Yu (劉豫), a former Song dynasty official. The Jin dynasty started peace negotiations with the Southern Song dynasty. In 1139, the Jin and Song dynasties arrived at a treaty, with the latter agreeing to be a tributary vassal state under the former. In return, the Jin dynasty returned control of Henan and Shaanxi provinces to the Song dynasty. However, in 1140, Emperor Xizong decided to wage war against the Song dynasty so he ordered the general Wanyan Zongbi to lead Jin forces to attack and seize back Henan and Shaanxi. In 1141, Wanyan Zongbi and his army were defeated by Song forces led by Yue Fei and Han Shizhong; the Jin dynasty agreed to negotiate for peace again with the Song dynasty.