The village chief coughed a few times, and Wu Da didn't ask any more questions, only saying, "You should sleep early, and remember to blow out the candle while sleeping so as not to set the house on fire."
In the end, Wu Da didn't come in.
He returned to his own room where his wife, Mrs. Niu, was. Mrs. Niu asked, "What's going on with your father? Lighting candles for no good reason in the middle of the night, isn't that just wasting oil?"
Wu Da said, "Well, he probably can't sleep because of the cough. It's just two candles, not like we can't afford it. What do you say, should I go check on him?"
"Check what?" Mrs. Niu said, "His illness is contagious. You're not afraid, but I am. We've got kids too. It doesn't matter if I get it, but what if the kids do?"
Wu Da thought about it for a moment, "Then forget it, let's not go, let's just sleep."
Wu Da extinguished the light and lay down, then sighed heavily. Mrs. Niu asked impatiently, "What are you sighing for?"