The ever-burning lamp of the front door in the countryside actually represents the ever-burning lamp of a ancestral temple and is a respect for ancestors.

The ever-burning lamp, the lamp lit by every household on New Year's Eve, cannot be blown out once it is lit until the oil runs out and the candle goes out by itself. This is an ancient traditional custom. For the record, the answer is for reference only. Please don't be blind and superstitious.