HC yog nyob rau hauv Changsha nroog, Hunan xeev, cov khoom tseem ceeb muaj xws li CRANKSHAFT, Lub tog raj kheej taub hau, lub tog raj kheej BLOCK, PISTON, PISTONG RING, CYLINDER LINER, BEARING. Cov khoom siv hauv marine, locomotive, generator, siv tshuab, tsheb thauj khoom hnyav, tsheb npav thiab lwm yam kev lag luam tsheb. Lub cav qauv npog CUMMINS, CATTERPILAR, DETROIT, VOLVO, MERCEDES-BENZ, MAN, DAF thiab lwm yam., kev txhim kho raws li cov neeg siv khoom kos duab lossis cov qauv yog peb qhov kom zoo dua. Tam sim no cov khoom tau ua tiav exported rau ntau tshaj 30 lub teb chaws