The sword used by Gou-Jian, the lord of Kingdom Yue. Argueably the most famous sword in the Chinese history. Gou-Jian was defected and hold captive by his nemesis Fu-Chai, the lord of Kingdom Wu. Gou-Jian played a humble servant and later insanity to gain the trust of Fu-Chai, who eventually released him. Gou-Jian then raised a new army and killed Fu-Chai with this sword.