长江是中国的第一大河,自青海发源,流经云南、西藏、甘肃、四川、湖北、湖南、安徽、江西、江苏,至上海汇入东海,全长5800公里,流域面积180万平方公里。该流域土地肥沃,气候温和,水量充沛,是农业发明较早、经济比较发达的地区。经过考古工作者60年的辛勤耕耘,已经确定,距今5000~4300年前,以浙江良渚古城为中心的良渚文化时期,长江下游地区已率先进入了王国文明阶段。那么以湖北、湖南为重点的长江中游地区,地理 The Yangtze River is the largest river in China. It originated in Qinghai and flows through Yunnan, Tibet, Gansu, Sichuan, Hubei, Hunan, Anhui, Jiangxi, Jiangsu and Shanghai to the East China Sea. It is 5,800 kilometers in length and covers an area of ​​1.8 million square kilometers. The basin has fertile land, mild climate and plenty of water. It is an area where agriculture was invented earlier and economy is more developed. After 60 years of hard work by archaeologists, it has been determined that 5,000 to 4,300 years ago, the Liangzhu Culture centered on the ancient city of Liangzhu in Zhejiang Province has taken the lead in the lower reaches of the Yangtze River to enter the stage of civilization. Then to Hubei, Hunan as the focus of the middle reaches of the Yangtze River, geography