Sending apples on Christmas Eve symbolizes peace and good luck, and sending "Peace Fruit" to each other on Christmas Eve is also a good blessing to others. One apple is safe all his life, two apples mean that two people will be together forever, and three apples mean family and beauty.

Life common sense refers to the scientific knowledge summarized by people in daily life, which can be divided into physics, biology, chemistry, medicine, first aid knowledge, geography, safety, cosmic celestial bodies, natural phenomena and other common sense contents.