National Highway 109 from Taoshankou to Haojiaji start from Taoshankou village Hexi town Tongxin county Wuzhong city, connect with the cross between S101 and S304, ends in Ning-Gan Boundary, Haojiaji village Xinren town Shapotou county Zhongwei city. The technical standard is secondary road.

The No.3 contract section is undertaken by our company from the year 2015 to 2016.