大一统是中国历史的鲜明特点。中世纪欧洲分为许多小的封建城邦，中国则很早就统一，而且越来越走向大一统、大融合的趋势。自周代的诸侯千百，变为战国七雄，到秦始皇统一全国后，中国统一时间之长久，在世界各国无与伦比。秦并六国，行中央集权制，置三十六郡，后又发展为四 Unification is a distinctive feature of Chinese history. Medieval Europe is divided into many small feudal cities, China has long been unified, and more and more toward unification, the trend of convergence. Since the princes of the Zhou dynasty have become thousands of Warring States, and after the Qin Shi Huang unified the country, the unification of time in China has been unparalleled in all countries in the world. Qin and six countries, the central bank system, set thirty-six counties, and later developed into four