The Zhangwan Bridge, the control project of the Xixia-Xichuan section of the Mianchi-Xichuan expressway in Henan, constructed by the tunnel company of CCCC First Highway Engineering Co., Ltd., has been open to traffic. The Xixi section of Mianxi Expressway is Located in Nanyang City, the Xixia-Xichuan section of the Mianchi-Xichuan expressway, with a total length of about 52.8 kilometers, has adopted the two-way four lane highway technical standard, with a design speed of 100 kilometers per hour. The Zhangwan Bridge is the longest highway bridge under construction in southwestern Henan, with a length of about 2.9 kilometers. After the project is completed, it will drive the development of surrounding tourism resources and promote the economic and social development of the areas along the route.