Before the Spring and Autumn Period and the Warring States Period, Shaanxi was an area where nomadic people gathered. They have no fixed place to live, have a strong sense of crisis, travel around all the year round, and are more operational. Later, Qin's fighting capacity was strong, and there were also reasons for this. In the Central Plains, which is based on agricultural society, people pay more attention to agricultural production, live a stable life, enjoy themselves and forget their worries, and their combat capability is relatively weak.