Longquan sword began in the spring and Autumn period and the Warring States period, more than 2600 years ago... According to the yuejueshu by Ou Yezi, in the spring and Autumn period, Ou Yezi chiseled CI mountain, discharged its stream, took Tieying from the mountain and made three swords, saying: "Longyuan", "tai'a" and "Gongbu". Longquan sword has a long history and is well-known at home and abroad. During the spring and Autumn period and the Warring States period, Ou Yezi smelted his sword at the foot of Qinxi mountain in Longquan《 According to the records of Baiyue sages, Ouye Gongbu Zi "chiseled CI mountain, discharged its stream, took Tieying from the mountain and made three swords: called 'Longyuan', 'tai'a' and 'Gongbu'.". Longquan, formerly known as Longyuan, was named after the sword. In the Tang Dynasty, it taboo "Yuan" and was renamed Longquan. Longquan sword is famous all over the world, and Longquan has also become the name of the sword. The Tu Xing sword can "wear a copper kettle, never iron, and the Xu Zhong will be like a rice, so it is called Tu Xing". The Tu Xing sword can stab the copper pot, and each burst is like cutting rice cakes. The power of its two swords is also described in later literature. Such as Xunzi: "Zhan, black also. Zhanlu, words are like water and black“ That is, Zhanlu sword is a black sword with both hardness and softness. Another example is in the Han Dynasty's Huai Nan Zi Xiu Wu Xun, which said: "if the husband is pure and Jun, the fish intestines... Are honed and sharpened, the water will break the dragon boat, and the land belongs to rhinoceros armor." Chunjun and Yuchang swords can cut off huge dragon boats on water and pierce solid rhinoceros armor on land. Their extraordinary power can be imagined. It is said that in order to gain the throne, the prince of the state of Wu sent assassins to kill Wang Liao and use a sword to pierce the three-layer armor of Wang Liao, using a fish intestines sword.