An aerial view shows the 7th cross-river bridge, on the Yangtze River in Wuhan city of Central China's Hubei province, which completed the closure of its two sections on Sept 27, 2011. The bridge's 616-meter span will be the longest among the world's three-pylon cable-stayed spans after the construction is completed.[Photo/Xinhua]

Contractors walk on the surface of the 7th cross-river bridge on Yangtze River in Wuhan city of Central China's Hubei province after the bridge's two sections were joined together on Sept 27, 2011.[Photo/Xinhua]