Jing Ke
Jing Ke originally came from the State of Wei. He was a scholar, proficient in the art of the sword. His homeland of Wei was absorbed by Qin, and Jing Ke fled to Yan. A "youxia" named Tian Guang (田光) first introduced him to Prince Dan. There Jing Ke accepted the hospitality of Prince Dan, who as a last resort decided to send an assassin against the King of Qin. The plan involved either kidnapping the king and forcing him to release the territories from his control; or failing this, killing him. The expectation in either case was that Qin would be left disorganized, enabling the other six major states to unite against it.