This sentence comes from Chapter 23 of Water Margin, which describes the appearance of Song Wu. Song Wu is an important figure in Shi Naian's classic Water Margin. It also appeared in Jin Ping Mei, because it ranked second, also known as "WuErlang".
After the bloody case in Yuanyang Building, Song Wu turned into a monk to avoid the pursuit of the government, and the Jianghu called him "Monkey Song Wu". Song Wu once killed a white-fronted tiger with his bare hands in Jingyanggang. Therefore, the story of "Song Wu killed the tiger" was widely circulated in later generations.
In the war of conquering Fang La, Song Wu countered Bao's loss of an arm. After the handover, he refused to return to Bianjing, became a monk in Liuhe Temple, was named the founder, gave money as wealth, and finally died at the age of 80.
Extended data
Celebrity's evaluation of Song Wu;
1, Mao Zedong: Jingyanggang should learn from Song Wu. In Song Wu's view, the tiger on Jingyanggang is stimulated like that, and it is not stimulated like that. Anyway, it eats people. It is one of them to kill the tiger or be eaten by it.
2. Xia Zhiqing: According to the heroic creed, if a hero feels that he or his relatives and friends have wronged him, he must do justice by himself instead of relying on ever-changing laws. Song Wu is a typical example of this kind of hero.
Although Song Wu's heart is always burning with the flame of revenge, he is completely portrayed as a respectable and simple hero, rather than a person who thinks his heart is complicated. We love him precisely because we admire him with sympathy.