A national key culture relic located at Anhai Town of Jingjiang City, Fujian Province, access to the highway between Fuzhou and Xiamen and the national road No 324. Anping Bridge extends over the bay between Anhai Township of Jingjiang and Shuitou Township of Anhai. The construction of the bridge started in Shaoxing Year 8 of Song Dynasty (1138) and completed in Shaoxing Year 22 (1152). Made of granite piers, the bridge is 2700 meters long and it was the longest bridge in the ancient times, known as “no bridge would be longer than this bridge”. The construction of Anping Bridge is unique, because the original piers were designed in three different shapes: square, semi-boat, and raft. The foundation of the bridge adopted “sunken foundation covered by wood” and wooden piles respectively according to the different earth layer. The surface of the bridge was laid with granite slates of 5-11 meters long and 4.5-25 tons each. The bridge surface was laid by utilizing the rising and falling of the tide.