Mountain Abrasives - Manufactures and exports green silicon carbide. www.abrasive-grain.com
Mudanjiang Hongli Chemicals Co. Ltd. - Manufacturer of oxalic acid, diethyl oxalate and tetramethyl guadinine. With technical data. www.honglichem.com
Travel China Guide: Heilongjiang - Basic facts, with further coverage of Harbin and the main sights. travelchinaguide.com/cityguides/heilongjiang/index.htm
