Swallow is an auspicious bird in China traditional culture, and it is a good omen to enter the house. Swallows can bring external wealth into the house, thus prospering the overall wealth in the house.
It is good news that the swallow entered the house, which means that the family will meet with good luck. It can indicate family happiness and family members can be more harmonious. Moreover, swallows are never afraid of people and like to get in touch with people.