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　　On May 27, the Wenzhou Oujiang North Estuary Bridge, the world’s first steel truss double-deck suspension bridge with three towers and four spans, opened to traffic. The bridge was designed and supervised by China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd., and constructed by China Railway Major Bridge Engineering Group Co., Ltd. and China Railway Hi-Tech Industry Co., Ltd.

 　　The Wenzhou Oujiang North Estuary Bridge, totaling 7.913 kilometers in length, features two 800-meter main spans crossing the river. Adhering to the “two bridges combined” construction principle, the upper deck is an expressway and the lower deck is a normal national highway. The bridge has set three world records: the world’s first steel truss double-deck suspension bridge with three towers and four spans, the world’s first multi-tower bridge using concrete to build the central tower, and the world’s first bridge with a super-large open caisson in the deep soft soil of a strong-tide estuary. At present, it is one of the most technically challenging and complex bridges in China and the world.