The series Graded Readers for Chinese Language Learners is composed of 50 books, divided into three subseries, namely folktales, literary stories and historical stories, corresponding to Levels 1-3 respectively. n the later years of the Warring States Period, the King of Qin quickened his pace of annihilating the other six states. Now that the State of Han had already been destroyed, Qin was now attacking Zhao, and Yan would be its next target.
Prince Dan of Yan was so worried he decided to send someone to kidnap the King of Qin. Dan found a warrior called Jing Ke and asked him to meet the King of Qin bringing the head of Fan Yuqi, a traitor of Qin, and the map of an area of Yan.
When Jing Ke met the King of Qin, he slowly spread out the map and a dagger appeared. Jing took the dagger in one hand and the King of Qin in the other. The King of Qin struggled so hard his sleeve was torn apart and managed to escape. Jing Ke was killed after his attempt failed.
The King of Qin defeated Yan and the other states and unified China.