China completes world's highest and longest tunnel-to-tunnel bridge.

The bridge, named the Aizhai Extra Large Suspension Bridge, will link together two tunnels 1,176 metres apart, and 355 metres above Hunan's Dehang Canyon.

A key section of the 64-kilometre-long Jishou-Chadong Expressway, the bridge features a standard two-way, four-lane motorway. The expressway runs through 18 tunnels in total, which cover about half of its length.

Construction of the bridge started in October 2007, with its main sections being completed at the end of 2011. The bridge was temporarily opened to pedestrians during the 2012 Spring Festival holiday season in February.
The structure is designed to help ease traffic in the mountainous region, where tailbacks are a common occurrence due to its narrow, steep and winding roads.
It has been dotted with 1,888 lights to increase visibility at night.