How to evaluate the role of Song Wu in Water Margin?

Song Wu, named after the second child, also known as Wu Er and Wu Erlang, was born in Qinghe County, Xingtai City, Hebei Province (it is also recorded that Song Wu was originally from yanggu county, and is now a native of Qinghe County, Xingtai City, Hebei Province through historical research), and is a protagonist in Water Margin.

Song Wu was a disciple of Zhou Dong, an iron-armed warrior in Shaanxi. A low-level chivalrous man with high martial arts and extraordinary courage. He advocates loyalty, revenge and kindness. He is the most bloody and legendary figure among the lower-level heroes, ranking Liangshan 14.

After the bloody case in Yuanyang Building, Jianghu people called him "Monkey Song Wu" in order to avoid the government and pretend to be a monk.

Song Wu once killed a white-fronted tiger with his bare hands in Jingyanggang, and the story of "Song Wu killed the tiger" was widely circulated in later generations.

Song Wu finally lost an arm in Fang La, and finally died in Liuhe Temple, living to the age of 80.

Appreciate Teacher Ding's Song Wu.

It was actually the historical figure Jiang who was mistaken for fiction.