In 209 B.C., Chen Sheng (陈胜) and Wu Guang (吴广), two men who were born in former Chu (楚) State, led many people to rebel against the Qin Empire. Their actions were supported immediately by the people of six former states (Chu 楚, Qi 齐, Yan 燕, Zhao 赵, Wei 魏 and Han 韩) , and the fire of rebellions was burning everywhere except the original area of Qin State. In 206 B.C., the short-lived Qin Empire was destroyed. Xiang Yu (项羽), a heroic general and leader, gave an region to Liu Bang (刘邦) who was one of the leaders of insurrectionists.

Nan Zi was the daughter of the monarch of Song State, and became the second wife of Wei Ling-Gong who was the monarch of Wei State. She was very beautiful, and she was dissolute. Wei Ling-Gong loved her profoundly, and satisfied all hopes of Nan Zi. Nan Zi wanted to meet her elder brother Gongzi Zhao. Gongzi Zhao and Nan Zi had only a father in common. In Song State, they were intimate. So when Nan Zi went to Wei State, she missed her brother and wanted to meet him. Actually Wei Ling-Gong sent an emissary to go to Song State and summon Gongzi Zhao to come to meet his sister.