The reconstruction project of Qingyang Bridge in Nanyang City starts from the intersection of Renmin Road and Qiyi Road in the north. The main bridge is 578 meters long and 40.5 meters wide. The main bridge is a 7-span mid-span unequal-span continuous arch beam cooperative system. The main beam is a semi-enclosed double-sided steel box, and the arch ribs are irregular polygonal steel boxes. The production capacity of our company is 23,000 tons.