Why did Chu Liuxiang fly a knife at Xiao Li?

Xiao Li's flying knife was taught to him by Li Xunhuan from Chu Liuxiang.

This is a scene from the Richie Jen version of the martial arts TV series The Legend of Chu Liuxiang. Jianghu people in Li Xunhuan call him Xiao Li Feidao, a character in Gu Long's works, who has high martial arts and is the embodiment of justice. His Xiao Li hit every shot and later passed it to Chu Liuxiang.

Chu Liuxiang, the hero of Gu Long's martial arts novel The Legend of Chu Liuxiang. It's a myth and legend written by Gu Long. He stole the gods at midnight, and the orchid smiled, showing elegance, calmness and courage. Be a charming person.