The Dujiangyan Irrigation System, 45km north of Chengdu, is the great technological achievement of ancient China. For more than 2,300 years of irrigation, Dujiangyan has benefited the local people just as it prevents Min River basin from annual flooding and made the ancient Shu State a famed ‘land of abundance'. This system still plays an indispensable function in agriculture in the modern day. This is the exit gate with the inimitable architecture while the modern skyrises dwarfing the old age.