In 1726, two local men, Fu Weng and Wang Kun, gathered funds to tame a treacherous stretch of the Lujiang River in Yunnan Province. For centuries, summer floods had swept away temporary wooden crossings, isolating the villages of Jianshui County. The builders chose a narrow bottleneck of the river to construct a permanent blue stone arch bridge. Completed in 1728, the structure stood firm until a catastrophic flood destroyed it in 1797. Undeterred, the community rebuilt it between 1798 and 1799, restoring its original form.

The bridge spans 121 meters, curving in a graceful, reverse "S" shape to hug the natural terrain. This design shortens the necessary span while maximizing the space for rushing water to pass. Three arches, assembled from wedge-shaped stones, support the deck. The central arch rises 9.5 meters, flanked by two nine-meter side arches. On the western face of the central arch, a stone-carved dragon head stares upstream, while its tail emerges on the eastern face, symbolically pinning the river.

At the center of the bridge stands a double-eaved, eight-sided pavilion. Inside, the ceiling features a painted Yin-Yang Taiji diagram surrounded by scholarly motifs. On the eastern wall, a stone slab bears the name "Tianyuan" in running script, carved by Li Erzhang, the Prefect of Lin'an, who believed the rapid construction was a gift of heaven-sent fate.

Walking across the 7.83-meter-wide deck, visitors encounter traces of human hands and folklore. At the south end, a stone stele pavilion houses seven historical tablets detailing the bridge's regulations. Nearby, a weathered, partially damaged stone lion stands guard alongside stone elephants. Embedded in the stone slabs of the deck are two human-like footprints, each about one chi long and one cun deep, spaced exactly one meter apart. Local legend attributes these marks to an immortal who helped the builders lift the heavy stones.

Today, the bridge sits in a quiet state. Modern roads bypass it, leaving the ancient path preserved as a provincial cultural heritage site that holds the memory of community resilience in its cold, chiseled stone.