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