Junfeng:Thera are some kinds of auditorium chairs with plates and wordpad 1.back board of chair back board is made of high quality hot forming multiply plywood ,after more than a surface treatment processes, covered with polyurethane paints 2.backrest : polyurethane foam covered with high-level shape seat fabric ,lined with high-quality plywood3.seat pan :polyurethane cold moulded injection foam ...