重庆是长江上游最大的经济中心、西南工商业重镇和水陆交通枢纽,自1997年成为直辖市以来,在政治与经济方面的重要性更加凸显。就是在这座被人们所熟知的“山城”中,交通物流运输与其他地方有所不同。重庆地势由南向北至长江河谷逐级降低,西北部和中部 Chongqing is the largest economic center in the upper reaches of the Yangtze River, the most important commercial and industrial center in southwest China, and the water and land transport hub. Since becoming a municipality in 1997, Chongqing has become more and more prominent in politics and economy. It is in this well-known “Mountain City ”, transport logistics and transport and other places are different. Chongqing terrain from south to north to the Yangtze River valley level by level, northwest and central