中国古代的都城是一个国家政治、经济、军事、文化的中心,尤其在中国古代早期,其政治功能更是占据主要地位。古代国家对外要求抵御外族入侵,对内要求制衡国中,确保百姓安居乐业,这就需要对都城的选址和营造提出严格要求。《管子·度地》云:“圣人之处国者,必于不侵之地。而择地形之肥饶者,乡山左右,经水若泽。” Ancient capital of China is a country’s political, economic, military and cultural center, especially in early ancient China, its political function is even more dominant. In ancient times, the external requirements of foreign countries to resist alien invasion, internally demanding checks and balances to ensure that people live and work in peace and contentment, which requires the location and construction of the capital city put forward strict requirements. “Pipe degree of” cloud: “Sage of the country, will be invading the land, and choose the fertile terrain, country hill, the water Jose. ”