It is inconceivable that the Qin Dynasty unified China from a small border country and established a huge Eastern Empire. However, what is the reason for the instantaneous destruction of such a huge national machine? I think it should be the tough political system of Qin State. Under this system, people have been greatly exploited for a long time. They have suffered numerous military service labors and exorbitant taxes, and their lives are unsustainable. However, people who have worked hard for many years in the engineering city have suffered greatly and the mortality rate is very high. The construction of the Great Wall, Epang Palace, Terracotta Warriors and Horses, and Farewell Palace consumed great national strength, which was less than the people's concern. Compared with the Han Dynasty, the first 70 years after the founding of the People's Republic of China were all rest, except the Qin Dynasty.