A man looks at pictures displayed at a photo exhibition on China's steel structure in the city library of east China's Shanghai Municipality, Dec. 5, 2012. The exhibition which kicked off on Wednesday will last until Dec. 9, 2012.

A man looks at pictures displayed at a photo exhibition on China's steel structure in the city library of east China's Shanghai Municipality, Dec. 5, 2012. The exhibition which kicked off on Wednesday will last until Dec. 9, 2012.

Editor: Shi Liwei