Saifuer Door Industry (赛弗尔门业有限公司) makes fire doors, oversized fire doors, fire-rated entrance doors, steel fire shutters, smoke curtains, steel fire windows and thermally broken fire-resistant windows, as well as blast doors and windows, pressure-relief doors, industrial and cold-store doors. It operates five production zones on a 68,000 m² site with about 368 staff, and handles installation and after-sales service. Its fire windows hold fire product certifications 5982020ZY050079, 5982022ZY050049 and 5982022ZY050050 from the Tianjin Fire Research Institute of the Ministry of Emergency Management.