The Yangtze River also known as Chang Jiang,snaking from Qinghai-Tibetan Plateau to the East China Sea,flows through provinces of Qinghai,Tibet,Sichuan,Yunnan,Sichuan,Hubei,Hunan,Jiangxi,Anhui,Jiangsu and city of Shanghai,with a total length over 6.300kilometers.It is the largest and longest river in Asia and the third largest in world,just inferior to the Nile in northeast Africa and the Amazon in South America.Because of plentiful rainfall,the Yangtze River makes great contribution to the irrigation and it is also a main shipping line of China.