From the perspective of geomantic omen, it is a sign of development that wasps nest outside the house window. Because after the hornet's nest is built, wasps will use it as a base to "let thousands of bees come to Korea" every day.
This kind of scene is reflected in human society, which means that the host family will become the center of interpersonal communication, and people will often come to your home. The reason why this happens in China is often because the family is either rich or expensive.