The Long Bridge is the largest stair stone arch bridge in Huangyao Ancient Town[1] among the 15 ancient bridges. It was built in the Ming Dynasty in Wanli for three years and was rebuilt in Qing Qianlong in 23 years (1759). The bridge is 22m long and 3m wide, with two arches, one large and one small, and the large arch is off the water, about5.6m diameter; the small arch is a dry arch, about2.55m diameter from the ground.