A Startling Autumn Leaf

The knife is made of pure steel, as thin as a bamboo leaf, but extremely sharp. Fu Yusheng drew the knife quickly. The flash of the knife flashed, and at the moment when the knife was inserted into his chest, what the traitor Yang Jun saw before his death was just a section of the knife handle with the word "Hang" engraved on it. Deja vu! There have always been some rumors about knives in the world. It is said that this is a very dangerous thing that scares many traitors. But I don't know, who really shot the knife? The autumn wind blows, causing bloody storms. The legend of Xiao Dao is seen again in the world...