December 24, Xining, the successful completion of 750 kV Substation 750 kV hoisting steel frame work of the 51.4 m high steel frame, steel beams span of 45 meters, voltage rating is the highest in our province, the maximum frame height, span beams the biggest and most difficult construction of the substation architecture. Chen Hailong  Wang Xiaogang/photographer

Editor: Carolyn