How about a swallow flying to build a nest under a human house? There are many swallows nesting in my house, and there is shit everywhere. Very annoying.

Haha, of course, from the ancient poem "In the old society, Wang Xietang died and flew into the homes of ordinary people", we can see that swallows are auspicious. What animals don't shit and dogs shit, so we should have a normal heart, which may mean that there is a happy event coming at home. Of course, we should also pay attention to cleanliness and keep the environment clean.