HEBEI OPTIMUM CONSTRUCTION MATERIALS (GROUP) CO., LTD specializes in the production and international sale of various fireproof wall, ceiling, seals etc., founded in 1992 as a construction materials producing company.My group has a strong technical force and modern production equipment, now has an annual output of 8 million m2 of calcium silicate board production line with an annual output of 10 million m2of the mineral wool board production line 2,an annual output of 10 million of the keel line 2,mature technology, advanced technology,stable quality.At present, the Group? own production and management fiber reinforced calcium silicate board, mineral wool acoustic board, keel and other dozens of products.