Ka 1985, Cheng'an County Ruinong khan combon co, Ltd. o thehiloe.

Ka 1999, ho theha lithupelo tsa thupelo, lithupelo tsa tokoloho ea ho kenella ha lithupelo le mesebetsi ea mochini e ile ea kenngoa tlhahiso.

Ka 2004, khamphani ea rona e ile ea fetola lebitso la HBei Ruinong Carbon Co, Ltd., lekala la rona la graniiti le ile la hahiloe.

Ka 2006, re ile ra fumana tokelo ea ho kenyelletsa le ho kenella moetlong. Re ile ra qala ho romela lihlahisoa tsa rona Jeremane, Czech Republic, Poland, Japan, Korea Boroa, Vietnam le linaha tse ling ka lilemo tse ling.

Ka 2011, re ile ra qala ho kopanya ho rerola le ho kenella.

Ka 2022, k'hamphani ea rona e ile ea qeta phetoho ea semela sohle.