公元前２０２年，刘邦、韩信垓下会师，项羽大败至乌江自杀身亡，秦、汉两个朝代的交替终于完成，中国封建社会的历史揭开了新的一幕。新兴的汉王朝是在基本沿用秦制的基础上存在和发展的，却避免了重蹈秦王朝“二世而亡”的覆辙。汉初的几朝政治家、思想家，在深入总结秦王朝 In 202 BC, the succession of Liu Bang and Han Xintao, and the defeat of Xiang Yu to Wujiang committed suicide. The alternation of the two dynasties of Qin and Han dynasties was finally completed. The history of Chinese feudal society opened a new scene. The emerging Han dynasty existed and developed on the basis of the basic use of Qin system, but avoided repeating the mistakes of “death of the second world” of the Qin dynasty. Early Han Dynasty politicians, thinkers, in-depth summary of the Qin Dynasty