Zuojiang Double-line Bridgeis located at the Yangmei Ancient City of Nanning City, crossing 168m mover the Zuojiang River. The bridge is the longest long-span bridge in Guangxi Province with the structure of cement and steel structure. Honored as the” Longest Long-span in Guangxi”, the bridge is also the longest bridge along the Yunnan-Guilin Railway. With the total length of 8453m, there are 252 abutments along the bridge. The main span is a 88+168+88 continuous rigid structure. The project is one of key controlled projects of the Guangxi Section of the Yunnan-Guizhou Railway.