The bridge is 7.9 kilometers long, its main bridge across the Ou River is 2090 meters long, the bridge width is 36.2 meters (including maintenance roads). The main bridge is a three-tower, four-span, double-layer steel truss girder suspension bridge, which is one of the most technically difficult and complex bridges in China and even in the world. The upper bridge deck is a six-lane expressway, and the lower is the key project of the Ningbo–Dongguan Expressway and National Highway 228 across the Ou River.

The bridge's load test used a total of 144 loading cars, each weighing about 35 tons, the total weight of the load reached nearly 5000 tons. This test is also the largest loading weight of the static load test for the current bridges in China. By testing the relevant structure, component index parameters, the load test will be a comprehensive assessment of the bridge construction quality, force performance, bearing capacity, etc., and provide valuable test data for the future construction of the similar bridges.

After completion, the daily traffic capacity can reach 107,000 cars, which will improve the national highway network, boost the highway transport capacity in China's eastern coastal areas, and further strengthen communication among the Yangtze River Delta, the west coast of the Taiwan Straits and the Pearl River Delta Metropolitan Region. It will promote and be of great significance to the economic development of Zhejiang, the building of the metropolitan area around Wenzhou.