The first thing I want to tell you is what is posted on the fire door. What is needed is an identity tag, which is what we often say. One door and one standard, just like a resident identity card, is followed by a fire nameplate, which is divided into wooden doors and steel doors. The corresponding nameplate can reflect the grade, production standard, fire protection grade and production date. And the materials attached with the door are: manufacturer's business license, certificate of approval and inspection report. Shanxi Liangyu Security Technology Co., Ltd. answers for you, hoping to help you, please adopt it.