There are flying swallows under the eaves recently. Is there any influence and countermeasures in Feng Shui Middle School?

Fortunately, I am in Fujian, and the swallows are lucky on my side. If it is built on the eaves, on the gates, or on the wooden beams of the living room of an old house, it is very good. In the living room, many people will make some horizontal boards to block bird droppings, and the living room window will be left for swallows to come back.