Cutter Suction Dredger 500 "Qing Jiang" At the end of 2013 the Chinese dredging company CCCC acquired a standard CSD500 to assist in the clean-up of the Mao Wei Sea in southern China. The CSD500 has been equipped with a wedge piece for efficient dredging in the extremely shallow waters of the Mao Wei Sea. Download Executive SummarySee all deliveries