In 1868, stonecutters gathered thirty-five meters south of a ruined crossing on the Baoxiang River. Floods had swept away the original Ming Dynasty structure. To defy the water, these Qing Dynasty builders erected a massive single-hole circular stone arch bridge, naming it Anliu—a homophone for safe, permanent longevity. They shaped wedge-shaped stone blocks to form a ten-meter arch, locking them together under immense gravity. Along the deck, they set cool bluestone slabs as protective railings.

This structure became the largest-span stone arch bridge over the Baoxiang River, measuring twenty-five meters long, six meters wide, and over nine meters high. For decades, it served as a critical passage along the Tongjing Ancient Courier Road, bearing the heavy, rhythmic beat of horse hooves carrying messengers from Kunming to Beijing.

Human hands left deep marks here. Stonecutters carved their dedication on two steles at the southwestern corner, recording the rebuilding and the community's merits. In 1982, the bridge found a new role when a television crew filmed the drama Cuotuo Suiyue here, prompting locals to nickname it "Cuotuo Bridge." That same year, it became a district-level cultural relic.

Time brought physical changes. In March 2011, a major municipal renovation stabilized the masonry, installing subtle artistic spotlights that cast a warm yellow glow across the water at night. Today, the bridge is a municipal cultural relic, nestled within dense vegetation and weeping trees. Visitors walk the stone deck, touch the weathered bluestone, and watch the river flow beneath the arch. It remains a quiet sanctuary, linking the ancient courier route to the modern city.