The first inspection item for the acceptance of fire doors is compliance with labeling. According to the requirements of GB50877-2014 "Code for Construction and Acceptance of Fire Shutters, Fire Doors, and Fire Windows", warning signs such as "Keep Fire Doors Closed" should be prominently displayed on fire doors. During on-site acceptance, key inspections should be focused on:

1. Reasonable location: whether the identification is located in the middle of the door leaf or in a prominent position on the wall to avoid being obstructed;

2. Content accuracy: The text should clearly indicate the fire prevention requirements, and vague expressions are strictly prohibited;

3. Material durability: The identification should be made of non combustible materials to prevent failure in high temperature environments.

4. Practical suggestion: For densely populated areas such as office buildings and shopping malls, LED dynamic warning lights can be added to enhance the warning effect.