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Dujiangyan City is one of the places inhabited by ancestors of the Shu State in ancient China. Located in the central part of Sichuan Province, Dujiangyan is not only a cultural city with a long history, but also a famous place of interest. The Dujiangyan Irrigation System on the northwest of the city is renowned far and wide.

Dujiangyan is located between 103.25 and 103.47 degrees east longitude and 30.44 and 31.22 degrees north latitude. And it is in the central part of the Sichuan Province in China, 55 kilometers from Chengdu city.

It covers an area of 1211.19 square kilometers.¡¡¡¡

Area code: 028
Postal code: 611800

It has a population of 580,000.

Subtropical humid climate; clearly four seasons; The average temperature of the coldest months is 4.6 degrees Celsius and the average temperature of the hottest months is 24.4 degrees Celsius, frost-free period is 300-340 days, annual rainfall 1243.80mm.

In China, Chengdu is always praised as the Tian Fu Zhi Guo, which means 'Nature's Storehouse'. Over 2,200 years ago, the city was threatened by the frequent floods caused by flooding of the Minjiang River (a tributary of the Yangtze River). Li Bing, a local official of Sichuan Province at that time, together with his son, decided to construct an irrigation system on the Minjiang River to prevent flooding. After a lengthy study and a lot of hard work by the local people, the great Dujiangyan Irrigation Project was completed. Since then, the Chengdu Plain has been free of flooding and the people have been living peacefully and affluently. Now, the project is honored as the 'Treasure of Sichuan', which still plays a crucial role in draining off floodwater, irrigating farms and providing water resources for more than 50 cities in the province. Dujiangyan is the oldest and only surviving no-dam irrigation system in the world, and a wonder in the development of Chinese science.

Answers.com: http://www.answers.com/dujiangyan
Dujiangyan at Wikipedia: http://en.wikipedia.org/wiki/Dujiangyan