云龙桥, Heritage bridge in Yangbi Yi Autonomous County, China.

Yunlong Bridge is an iron-chain suspension bridge over the Yangbi River northwest of Yangbi county town in Yunnan. It is 40 metres long and 3.27 metres wide, with a deck of chestnut planks laid on eight iron chains and iron chains as handrails on both sides. Pavilion-like bridge houses stand at each end.

Yunlong Bridge was first built during the Chongzhen reign of the Ming dynasty as a crossing of the Bonan Road where it passed through Yangbi toward Yongping and Yunlong. It was rebuilt in 1692, under the Kangxi emperor, and repaired in 1876, under Guangxu, with further work in the early Republican years. On 24 August 1966 a flood destroyed the eastern pier and the deck; locals put up a rough steel-cable bridge, and in 1994–1995 government funds restored the original form.

The bridge is nicknamed "Yangjiang Feihong" (Flying Rainbow over the Yangbi River) for its setting over the water. Its name, Yunlong, means "Cloud Dragon". Plaques with calligraphy by Li Genyuan (1913, "Tiesuo Yunlong") and other notable figures hang in the pavilions at each end, where travellers on the Bona ancient road once paused.

The bridge stands on the Yangbi River northwest of Yangbi county town, where the old Bona road crossed toward Yongping and Yunlong. The deck is 40 m long and 3.27 m wide, made of chestnut planks laid over eight iron chains, with chain railings on both sides. Pavilions stand at each bank; the 1966 flood destroyed the east pier and deck, so the present crossing was restored to its original form in 1994-1995.

The bridge is nicknamed "Yangjiang Feihong" (Flying Rainbow over the Yangbi River) for its setting over the water. Its name appears on a plaque reading "Tiesuo Yunlong" (Iron Chains, Cloud Dragon), written by Li Genyuan in 1913 and once hung at the bridge pavilion.