Lies in the west of the city of Songjiang, the No.1 Bridge is also called Kuatang Bridge for it stretches across Putang River. It is recorded that the bridge was built with wood in the Song Dynasty and its large size won it the honor as the No. 1 bridge. It was reconstructed into a three-arched stone bridge with 10 meters in the height and 50 meters in the length in the period under reign of Cheng Hua in the Ming Dynasty. It was rebuilt in 1988.