The bridge connects Chenjia in Chongming County in the south with Qidong in the north, and was built from 2008 to 2011 at cost of RMB8.238 billion.[1] The project built 51.763 km (32 mi) of viaduct, including 6.84 km (4 mi) across the north fork of the river. As of December 2011, the bridge was the longest box girder bridge in China.[1] The longest span is 185 meters.[1] Major construction was completed on September 21, 2011 and the bridge opened to commercial traffic on December 24, 2011.[2][3]