In 1122, a mason named Hu Shiming finished locking seventy tons of granite into a single arch over the Bingyujian stream in Lushan. He carved his name, his donor Lei Chun, and the date—the fourth year of Xuanhe—directly into the stone vault. For centuries, official county records ignored this physical reality, attributing the bridge to an earlier era. The truth remained submerged in the dark, damp silt of the stream bed until modern investigators used forensic lights to read the cold granite.

The bridge, historically called Xinghu Bridge and later Guanghui Bridge, spans 5.3 meters across the water. Hu Shiming built the vault using a transverse parallel design of seven parallel ribs. Each rib contains seventeen massive square blocks. Each block measures two feet square and weighs six hundred kilograms. To touch these stones is to feel the sheer physical labor of the Northern Song Dynasty.

The carved characters beneath the arch reveal a forgotten political landscape. They name local officials—Magistrate Chen, Governor Wang, Silu Zheng, and Tongpan Liu—who were completely erased from traditional local gazetteers. Their titles bear the bizarre addition of "Superintendent of the Sacred Palace of Divine Empyrean Jade Purity," reflecting Emperor Huizong's obsessive devotion to Taoism just three years before the dynasty collapsed.

This bridge survived the wars and fires of the centuries. Recently, during the construction of Taoyuan Road, engineers discovered the ancient structure directly in the path of the new highway. Instead of destroying it, they curved the modern asphalt road around the site, cradling the 1122 stone arch in the center of the new lanes. Today, the bridge stands at its original location in Nankang Town, a provincial-level protected monument since 2025. It remains a physical record of forgotten lives, preserved in granite and surrounded by the hum of modern traffic.