I Asked You to Chop Firewood, and You Cut Off the Baizhang Waterfall with One Knife

When he was ten years old, Gu Yuan witnessed a mysterious swordsman slashing the Baizhang Waterfall with one strike, and he became obsessed with the art of swordsmanship. There is no system, no internal skills and mental methods, and no guidance from experts. He only uses the stupidest method: drawing his knife ten thousand times a day under the waterfall!