Open. Shougang Bridge, a river-crossing channel connecting Shijingshan District and Mentougou District in China, crosses Yongding River. It is the world's first double-tower cable-stayed steel structure composite system bridge under construction, and it is the key node of the west extension project of Chang 'an Street in China. After inquiring about the relevant information of Shougang Bridge, the lights were turned on on 10/month/day. Shougang Bridge starts from Shijingshan and ends at Mentougou, passing through the west end of Chang 'an Avenue, with a total length of1.354m and a width of 54.9m.. This main road has four lanes.