The Sword Comes from the Mortal World

This young man came to Qingshi Town really just to watch the rain. A pot of wine, a plate of peanuts, and a rusty broken sword. The charlatan in the restaurant drew his sword at him, but he didn't even bother to take off the sheath. He blocked the sword and shattered it. No one knew who he was or where he came from. Until that murderous case broke into his journey, and a man in white holding a paper umbrella blocked his way. The killer of Lengquan Hall has disappeared, and the writings of the ancient swordsmanship sect have reappeared in the world. All clues point to an existence that should not appear in this world. He came to see the rain, but there was still wind and rain besides the wind and rain. The sword was already in hand, so I cut it open and took a look.