In geomantic omen, avoiding fire dragon is a kind of god beast in the five elements, which is considered to be able to avoid fire and evil invasion. It may take 1 day to take effect after placing. But these are all idealistic historical views. We should believe in science and adhere to historical materialism.
In practice, avoiding the fire dragon cannot really avoid the fire. Therefore, in our daily life, we still need to take practical fire safety measures, such as regularly checking electrical appliances and installing smoke alarms, to prevent fires.