During the Jingyuan period of Xi Yan, the prime minister Su Mingyuan was deeply involved in the court and had many disciples. The seventh prince Bai Ying went west under the order to thoroughly investigate the salt patrol envoys who secretly increased the salt tax and enriched their own pockets. During the investigation, they fought with the Uighur army and fell seriously injured into the Qianhong Valley. They met the medical sage Dian Hong and his disciple Lin Zhaohan. After returning to the capital, they finally overthrew Su Mingyuan and ascended to the throne of the prince.
Purpose: Those in power should love the people first and then themselves.