自陈胜、吴广举起反秦大旗,全国到处掀起了反抗秦朝的起义。秦朝被推翻后,又经过了五年的楚汉战争,最终刘邦打败了项羽,建立了西汉皇朝,于是,历史翻开了新的一页,进入一个新时代。之所以说进入一个新时代,是因为从春秋以来,随着周天子的大权旁落,国家就陷入了战乱纷争状态。《史记》把这段历史依次概括为:“周室衰 Since Chen Sheng and Wu Guang lifted the banner of opposing Qin, there was a revolt around the country that revolted against the Qin Dynasty. After overthrowing the Qin Dynasty, it went through a five-year war between Chu and Han. In the end, Liu Bang defeated Xiang Yu and established the Western Han Dynasty. As a result, history opened a new page and entered a new era. The reason for entering a new era is that since the Spring and Autumn, with the fall of the sovereignty of the Son of Heaven, the state has fallen into a state of war and strife. ”Historical Records“ summarizes this period of history in order: ”Weeks room failure