The fifteen-year-old girl Yin Xuan turned into a nine-year-old after falling asleep in the library, and returned to the childhood of Qin Shi Huang, becoming Ying Zheng's childhood playmate. She watched Ying Zheng annihilate the six kingdoms, but could not tell him that the great empire he created would collapse in the second life, and finally returned to the 21st century under Ying Zheng's surprised eyes.
Purpose: Respect history