The Najiehe Railway Bridge is a steel arch bridge in central Guizhou, China. With a rail height of 305 m (1,001 ft), this is the highest railway bridge in world.
The truss arch is also one of the longest arch bridges with a main span of 352 m (1,155 ft).
The bridge crosses the Sancha River between Zhijin in Bijie and Qingzhen in Guiyang. The bridge is part of the new Lindai-Zhijin Railway line between Zhijin County and Guiyang.
Although the Najiehe Railway Bridge is officially 310 metres high, the bridge crosses over the reservoir created by the Dongfeng Dam and is only be 285 meters high when the reservoir is at full water level.
According to en.wikipedia