Chengyang Bridge is a special covered bridge, it is a wind and rain bridge. These bridges are meant to protect people from wind and rain. The bridge is a combination of bridge, corridor, veranda and Chinese pavilion. It has two platforms (one at each end of the bridge), 3 piers, 3 spans, 5 pavilions, 19 verandas, and three floors. The piers are made of stone, the upper structures are mainly wooden, and the roof is covered with tiles. The bridge has wooden handrails on both sides.

Chengyang Bridge (also known as Wind and Rain Bridge) was built in 1916, and it is the most famous among the wind and rain bridges in the Dong Minority Region in China. The bridge stretches across the Linxi River and it still in heavy use.

It is constructed of wood and stone without nails or rivets and is the largest of all the wind and rain bridges. The bridge has a total length of 64.4 metres (211 ft), and its corridor has a width of 3.4 metres (11 ft). The net height above the river is about 10 metres (33 ft)

More Info: en.wikipedia.org