The Entrance Fire Door(https://www.zjchenma.com/product/fireproof-door/entrance-fire-door/) is a vital component of a building's passive fire protection system. They are designed to provide a barrier against the spread of fire, smoke, and heat, thereby ensuring the safety of occupants and allowing for a more controlled evacuation in the event of a fire emergency. However, the effectiveness of these doors is contingent upon their long-term maintenance and proper functioning.