Nest in the sky and Dujiangyan Dujiangyan City gate, is a regulator of Dujiangyan in the first diversion of rivers important water conservancy facilities. Winter gate built in 1963, is divided into six holes, Pope Creek trunk canal and the river walk 3 hole, chamber of net width 9 meters per hole, the use of single-track electric road mobile hoist. 1975, instead of every hole open and close an electric winch. Ministry of Water Resources requested by the winter of 2002, a serious brake on the aging room, opening and closing platform conversion, gate and gate all updated equipment, and completed in November 2003. After transformation, the gate across the sky and Neijiang General nest above the city echoes with the landscape, the total control of Neijiang, the interests of Tianfu, hailed as the first gate Xishu.