1, slate gypsum board is produced in Nanhai, Foshan, Guangdong. Gypsum board is a kind of material made of building gypsum as the main raw material. It is a building material with light weight, high strength, thin thickness, convenient processing, sound insulation and fire prevention.

2. Jack brand products mainly include bending needles, sewing machines, computer sewing machines, sewing machines, industrial sewing machines, cloth cutting machines, cloth cutting machines and packaging lines.