■ XU21 steel box girder bridge is located on the east-west main line of Xindian Street. The bridge goes along the route and crosses successively fen-Huang Connection line and Tai-Lan line from west to east.
 

■ XU21 steel box girder bridge, with a total length of 168m, is divided into 83m+85m two-span steel box girder with variable height along the road. The bottom of the bridge is about 3m from the railway height.
 

■ The steel box girder was assembled and welded in the north side of the railway in the direction of the railway, and then rotated 41° across the railway as a whole.
 

■ The total weight of the rotating structure is 8000 tons, and the construction period of the site is 45 days.