According to legend, the king of the chu ordered that zhizi, a famous swordsmaker, create three masterpieces. The first of these masterpieces is known as the "King of all swords," and the second two are known as "long swords" and "kings of swords." The third is called "long sword" and is believed to be the creation of the "longyuan" . The old man thinks that the sword is indeed the real thing, but he is still uncertain whether it is long yuan or not. He asks the old man to put the sword on the ground to see if it is indeed long yuan.