In the works, Wu Dalang's younger brother Song Wu is actually more than 270 years older than Wu Dalang. He is from the Song Dynasty, which is totally different from Wu Dalang. Historically, Wu Dalang lived in the Ming Dynasty, not the Song Dynasty in the Water Margin. Because of his second place, Song Wu was nicknamed "Walker", also known as Wu Er, Wu Erlang and Wu Shihui. He is from Kongsongzhuang Village, Qinghe County, Dongping Prefecture, Shandong Province (now Wangshizhuang Village, Qinghe County, Hebei Province). He is the protagonist in Water Margin (written by Shi Naian) and an important supporting role in Justice of the Peace. It was once mistaken for fiction, but in fact it is a real historical figure Jiang. Wu Dalang, formerly known as Wu Zhi, was born in Wujiana Village, Qinghe County. Now Wujiana Village still has its grave. He was born tall, and judging from the length of calf bone, Wu Dalang was around 1 m 78. He looks good, and he doesn't sell baked wheat cakes, which is completely different from the image described in Water Margin. His parents died when he was very young, but he is smart, studious and knowledgeable. After graduating from college, he was a scholar in high school and served as the magistrate of Yanggu County, Shandong Province.