重庆是一座建立在山上的立体城市,横贯中国东西部的长江从它的身边流过。长江上游大部分位于四川境内,因此也被称为川江。由重庆开始,川江即将进入最为险峻的峡谷地带,重庆因此成为川江上最大的水陆码头。重庆成为中国第四个直辖城市后,环境的改变和生产方式的变迁使得古老 Chongqing is a three-dimensional city built on the mountain. The Yangtze River that runs through the east and west of China flows from it. Most of the upper reaches of the Yangtze River in Sichuan Province, it is also known as Chuanjiang. Starting from Chongqing, Chuanjiang is about to enter the most rugged canyon area, making Chongqing the largest water and land terminal on the river. After Chongqing became China’s fourth municipality directly under the Central Government, changes in the environment and changes in the mode of production made ancient