What is the legend about Li Changgeng?

The legend of Li Changgeng: During the Qianlong period of the Qing Dynasty, Tong'an County was under the jurisdiction of Quanzhou Prefecture. When Li Changgeng was young, he and his companions often traveled to and from Quanzhou to do business. It happened to be the time when Quanzhou set up a thunder platform for martial arts competitions. Quanzhou is an ancient city with huge Some people came from the northern provinces, traveling south from the Jin Dynasty through the elites of the Tang and Song Dynasties, hiding their names. It was a land of hidden dragons and crouching tigers. In the early years, there were many masters of Wuzu Quan, White Crane Quan, Shaolin Quan, etc. There were many masters. Chang Geng's newborn calf was not afraid of tigers. He was very brave and skilled. He jumped on the thunder platform and won consecutively. Finally, he came out on top. For several days, the old boxers in Quanzhou were so angry that they screamed, "How dare the young man from there run wild here! Good guy, People from all walks of life gathered a group of thugs to kill Li Changgeng's majesty. You know, this fight is not that simple. Fortunately, Li Changgeng is brave and resourceful and has made preparations early. A group of brothers around him, Not daring to fight, a strong dragon will not overwhelm the local snakes. When we arrived at the Jinjiang River, there were already boats there to meet us. One by one, they jumped on the boats along the bamboo poles and set sail back to Tong'an