我国江河纵横,湖泊密布,东南临海,水域辽阔,海岸线长达1.8万公里,发展水上运输具有良好的自然条件。我国水上航运发展历史悠久,早在远古社会,人们刳木为舟,创造了最早的水上交通工具。在历史的文字记录上,可以看到许多有关江河湖泊、开凿运河、利用舟楫进行战争和运输的记载。与万里长城齐名的南北大运河更是中国人民改造大自然开发水上交通的一项伟大工程。明朝永乐年间,伟大的航海家郑和率领庞大的船队,7次下西洋,航程数万里,论时间早于哥伦布发现美洲新大陆半个世纪。由此可见,我们的祖先在发 The rivers in our country are criss-cross, the lakes are densely covered, the southeast is near the sea and the water area is vast. The coastline is up to 18,000 km and the development of water transport has good natural conditions. China’s maritime shipping has a long history of development. As early as in ancient times, people built alms for boats and created the earliest water transport. In the history of the text records, you can see a lot of rivers and lakes, digging canals, the use of boats to war and transport records. The Great Wall and the Great Wall north and south of the Grand Canal is the Chinese people to transform nature to develop water transport a great project. The Ming Dynasty Yongle years, the great navigator Zheng He led a huge fleet, seven times the West, the flight tens of thousands of miles, on the time earlier than Columbus found the New World half a century. This shows that our ancestors are sending hair