The Wujialing Overpass Bridge in Changsha is 637 m in length from east to west and is 9m in width, which connects Changsha-Yong’an Expressway, Changsha-Changde Expressway, Furong Road and other traffic arteries. It is a four-layer interchange and, from an overlooking perspective, it is like “snap-in of two fishes”. It was designed with complete traffic function and smooth line style and according to high technical standards.