It is an important component of traditional Chinese culture and represents one of the twelve zodiac animals. In the ancient Chinese calendar system of heavenly stems and earthly branches, each zodiac sign corresponds to a earthly branch, and the earthly branch corresponding to the rat is "zi", hence also known as "zi shu". In the legends of the twelve zodiac animals, the rat is known for its wit and agility. According to legend, when the Jade Emperor selected the zodiac animals, the rat, with its intelligence and wit, was the first to arrive at the Heavenly Palace and became the head of the zodiac. It embodies the agility and agility traits of mice. It is considered a symbol of wisdom and wealth because mice are good at accumulating food, symbolizing abundance and harvest. But sometimes it is also often associated with negative images.