A doctor of materials science from 985 passed through the book and became the fifth princess of Xiao Jingheng, the crazily criticized prince. Knowing that all the previous four time-travelers died tragically, she pretended to be stupid and abided by ethics just to survive. At the palace banquet, a beautiful girl singing a modern song was killed with a stick. The East Palace was assassinated by a fake time travel rescue team, but was rescued by the prince. She was shocked to find that the prince knew how to use a firecracker and knew all about the time travellers. Later, she donated cement to save the refugees and used egg white and goat milk to detoxify the emperor. Gradually, she discovered that the prince was not really crazy, but was only injured by passers-by. The countdown to world reset starts, and the two reveal their sincerity to resolve the crisis. After the prince ascends the throne, she works to benefit the people, and she also has to deal with the new time-travelers.
