Protagonist: Su Jinyao
- Identity: Su Qing, a modern civil engineer → the daughter of the Prime Minister of Qingzhou County in the Southern Dynasty, seventeen years old
- Personality: pragmatic and tenacious, logical and logical, with slight obsessive-compulsive disorder (controlling the details of infrastructure). In the early stage, he was a little unfamiliar with ancient rules. In the later stage, he was calm and decisive, protected his shortcomings and valued people's livelihood. 1. Lin Moyuan: Qingzhou County Magistrate, forty years old, upright and honest but controlled by the wealthy gentry, had no ambitions and was unable to display his ambitions. After discovering Su Jinyao's talent, he fully supported her and became her "court supporter". Later, he was promoted to the state capital, always adhering to the bottom line of people's livelihood.
2. Zhao Hu: Leader of the refugees, he was a retired soldier, brave and loyal. He was impressed by Su Jinyao's "field distribution + workshop employment", led the refugees to participate in infrastructure construction, and became the captain of the escort team, responsible for public security and project security.
3. Aunt Liu: A local old woman who is proficient in farming and herbal medicine. She is Su Jinyao's "ancient life mentor". She helps promote improved farm tools, guides crop planting, and later takes charge of the people's livelihood workshop.
