Check whether the ceiling fan suspension device is reliable before use every year. It is better to use the steel bar hook in the prefabricated ceiling panel to install the ceiling fan. If there is no steel bar left in the ceiling, the steel bar with a diameter of about 8 mm should be used for lifting. Do not try to save time. It is very dangerous to use multiple strands of iron wire for twisting and lifting. When installing the ceiling fan, pay special attention: the rubber wheel on the ceiling fan is used for shock absorption and cannot be discarded.