Yi Yin was a famous figure in Shang Dynasty and served as the highest consul. He helped Shang Tang attack and destroy Xia Jie, and established the Shang Dynasty. With his assistance, the various systems of Shang Dynasty were gradually established and the national strength became stronger and stronger. After Shang Tang's death, his sons Waibing and Renzhong successively succeeded to the throne, but both of them were in office for a short time, and both of them were assisted by Yi Yin. After Zhong Ren's death, Yi Yin made Tai Jia king. Because Tai Jia didn't abide by the established rules, he was exiled to the same palace by Yi Yin. Three years later, Tai Jia repented and reset.