Qin Zhongliang wrote in an article of the first issue of the Journal of Xiamen University (Arts &Social Sciences)in 2023 that "time of peace and prosperity (治世)" was one of the highest forms of national governance in ancient China. In the early stage, the concept of "time of peace and prosperity" was used by Taoism, Confucianism, Legalism and Mohism, but later it was adopted by Buddhism and finally became Confucian philosophy of national governance. The "time of peace and prosperity" carries a whole set of theoretical systems, and its most important connotation is that people were rich in resources, the population was increasing, virtuous people were recruited by the government, penalty was not misused, civil administration was emphasized, military preparedness was adequate and surrounding barbarian tribes paid tribute to the court. As a concept,“golden age(盛世)” was likely not more often used than “time of peace and prosperity” until modern times."The reign of the three dynasties" and "the reign of Zhenguan" are two systems that have the greatest influence on later generations. The former is a fictitious concept and often used by scholars to claim their own ideals of national governance. The latter happened in reality and was admired and imitated by the ancients.