I recommend " Great Qin: The First Emperor of Qin Can Hear My Heart ". The main character of this historical fiction novel, Li Zhao, traveled to the era of the First Emperor of Qin, only to discover that the First Emperor of Qin could hear his heart and was appreciated by him. In this novel, Li Zhao helped Qin Shihuang prolong his life, made suggestions, and changed the Great Qin Dynasty with modern technology, achieving the legend of Qin Shihuang unifying the world. The novel was finished and was worth reading. I hope you like my recommendation.