“天下大势,分久必合,合久必分。”在中国历史的发展进程中,统一和分裂的演进趋势独具特色,而统一始终是其主流。自东汉末年董卓之乱以后,除西晋曾有短暂的统一以外,中原一直处于分裂状态。在这一时期,随着统治阶层的变化,世族门阀势力衰落,庶族地主阶层的地位逐渐上升;南北经济的发展为全国的重新统一准备了条件。杨坚在北周的统治基础上,顺应历史潮流,建立全国一统的隋朝,为唐代的繁荣奠定了基础。 “In the course of the development of Chinese history, the trend of unification and division has its own unique trend, and unification has always been its mainstream.” Since Dong Zhuo’s chaos in the late Eastern Han dynasty, except for a short period of reunification in the Western Jin Dynasty, Central Plains has been in a state of separation. During this period, with the change of the ruling class, the gatekeeper forces of the Greeks declined and the status of the landlord class gradually increased. The economic development in North and South Korea set the stage for the reunification of the country. On the basis of the rule of the North Zhou Dynasty, Yang Jian complied with the historical trend and established a nationwide unified Sui Dynasty, laying the foundation for the prosperity of the Tang Dynasty.