Great rivers give birth to great cities.China's largest river, flowing 6,300 kilometers from the Tanggula Mountains, flows into the vast East China Sea at the midpoint of Chinese mainland's coastline and in the heart of China's richest hinterland in the south of the Yangtze River.The great Yangtze River and the winding coastline form a bow and arrow map, what lies in the arrowhead is the largest city in China - Shanghai.