Background of the times: Empty the "Jing Dynasty", learn from the social structure and political system of the Song Dynasty, emphasize culture over military affairs, have a prosperous economy but frequent foreign invasions
· Special elements: Retain part of the citizen life, scholar-official culture and scientific and technological level of the Song Dynasty, and add overhead elements such as "celestial observation" and "organism"
· Characteristics of the heroine: innocent love-minded in the early stage, deep resourcefulness in the later stage, good at scheming and strategic planning, and good at exploiting information asymmetry
