The reason why the second day of the second lunar month is called Dragon Head Lift Festival is actually related to the ancient astronomical phenomena. According to the trajectory of the five stars of the sun, the moon and the sky are divided into 28 days, so as to indicate the movement and position of the five stars of the sun, the moon and the moon.

The 28-day stay can be divided into four regions, and the Oriental black dragon includes seven nights: Jiao, Kang, Bian, Fang, Xin, Wei and Ji.

Western white tigers include Kui, Lou, Wei, Chang, Bi, Gou and Shen Qi.

South Suzaku includes seven nights, namely, well, ghost, willow, star, Zhang, wing,

Northern Xuanwu consists of seven places: fighting, ox, female, deficiency, danger, room and wall.

Among them, the "horn lodge" is the dragon horn. On the second day of February, the dragon horn star rose on the eastern horizon, so it was called the dragon's head.