The desks and chairs of doctoral school are made of 18MM polka dot board, which is scratch-resistant, easy to clean and has two-color arc edge banding. The chair surface is made of brand-new PP engineering plastic, which is molded in one step. The hardware table and chair frame is made of 30*70*1.2mm elliptical pipe with columns, the anchor is made of high-quality hardware paint, and the foot cover is made of imported PP engineering plastic by injection molding. Schoolbags are made of high-quality round pipes and wires welded in opposite directions.