The Danyang-Kunshan Grand Bridge, on the Jinghu High-Speed Railway (aka Beijing–Shanghai High-Speed Railway) is 164 km (102 miles) long. This new line (open from June 2011) also crosses the 114-km (70.8-mile) Langfang–Qingxian viaduct, the second longest bridge in the world.
Please note: Comments below may relate to previous holders of this record.