Since ancient times, people have also taken the day when the Dragon Star appeared on the earth's surface in the middle of spring as an auspicious day to pray for good wind and rain, to drive away evil spirits and calamities, and to bring good fortune. The Dragon King is in charge of rainfall, and when he goes up to the Heavenly Palace, farmers have to offer the best sacrifices to the Dragon King.

Using a pig's head as an offering to honor ancestors. In ancient times, the pig's head was an offering to the ancestors and to heaven. In the north, on February 2, the day of the dragon's head, every family cooks pig's head, because the first day and the fifteenth day of the year are over, and February 2 is the last festival of the Spring Festival.

Generally, farmers have been busy for a year, to the 23rd day of the lunar month, when the small year to kill pigs and slaughter sheep, the first month of the first, the pork killed in the lunar month basically eaten up, the last remaining a pig's head, can only be left in the February 2 to eat. These customs send people pray for the dragon blessing, blessing the wind and rain, the good wishes of the grain harvest. Solemnly declare: the answer is for reference only, please do not blindly superstitious.