Is “Was captured by Niu Gao and died of anger.” true?

To avenge Yue Fei, the novel arranges for Jin Wushu to be captured alive by Niu Gao in the final decisive battle, where he dies of anger and humiliation. The original text directly states: 「兀术被牛皋擒住，愤怒气死，牛皋也大笑而亡。」（《说岳全传·第八十回.txt》）However, according to the 《金史·宗弼传》, Wanyan Zongbi, after the Southern Song's submission and peace negotiations, continued to hold military and political power in the Jin dynasty, eventually dying of illness in the Jin capital Shangjing in the eighth year of Huangtong. This fictional defeat ending is purely a creation of the historical novel to cater to the public's desire for justice and retribution.