China attractions - Dujiangyan irrigation system is founded not far from Guanxian town and on the upper reaches of the Minjian river, northwest to Chengdu city.

Dujiangyan was constructed and completed in 256 BC by Li Bing, the prefect of Sichuan at time of the Warring Kingdoms, in order to prevent catastrophic flooding. In the great project, the river was divided up by earth dams, with one section branching out into tributaries and canals which served to irrigate the fields. The whole complex is made up of the ''Fish's Jaws'' (Yuzui), which functions as a watershed and dike, the weir known as ''Flying Sands'' (Feisha Yan) and the canal, the ''Neck of the Precious Bottle'' (Baoping Kou).

This ingenious system has meant that the Minjian has never again flooded its banks during the last 2200 years, and the Chengdu Plain of central Sichuan has become one of China's most fertile regions.