Thunder and Dongfeng

This book tells the story of the heroine Tang Yan who had a misunderstanding with her boyfriend Li Xu. During the quarrel, she traveled back to ancient times and became Zhao Zhilan, the daughter of Grand Master Zhao. He used the medicine he carried with him to cure the diseases of the emperor and the prince, developed a relationship with fellow traveler Zhang Ruize, used modern knowledge to repeatedly resolve crises, and led troops to repel the enemy's invasion.