In ancient times the two southern kingdoms of Yue and Wu were long at war. The King of Yue, Gou Qian, kept himself ready for combat at all times by sleeping on a bed of straw and drinking from a gallbladder. But the Wu army was universally acknowledged to be superior, mainly due to General Wu Zixu's strategic prowess, learned under the master tactical Sun Tsu. One day, however, a beautiful young woman, accomplished in the art of the sword, arrived in Jiaxing, then located just inside the Yue border. One of the kingdom's highest-ranking ministers, Fan Li, asked if she would teach her skills so they might defeat the Wu. So it happened that Jiaxing came to be the home of this particular sword technique, passed from master to disciple, generation to generation. It was, however, designed for battle, for slicing up generals and puncturing horses. When used against the masters of the wulin, it lacked the necessary agility and forcefulness. It was not until the dying years of the Tang dynasty that the repertoire came to be expanded by a swordsman familiar with the martial arts of ancient times, who added his own moves and made it faster and more complex.
Jade Han had studied the technique to such a level as to earn her the nickname Maiden of the Yue Sword.