Alluding to the rise of Erlong in early February.

The story of the rise of Erlong Mountain in early February is as follows:

In ancient China, in order to know the stars, observe the astronomical phenomena and judge the seasons, some stars in the equatorial region and the ecliptic region of the celestial sphere (that is, the celestial sphere where the moon and the sun move) were divided into 28 star groups, which were called 28 nights. Twenty-eight lodges form an elephant every seven nights, which is divided into four elephants: East Black Dragon, West White Tiger, South Suzaku and North Xuanwu.

As the earth revolves around the sun, the stars in the sky change with the seasons. Every evening at the turn of winter and spring, the black dragon appears; At the turn of spring and summer, Xuanwu rose; At the turn of summer and autumn, white tigers emerge; At the turn of autumn and winter, Suzaku rises.

The East Black Dragon consists of horn, health, ground, house, heart, tail and dustpan for seven nights. The horn night symbolizes the dragon horn, the healthy night symbolizes the dragon neck, the earth night symbolizes the dragon chest, the room night symbolizes the dragon belly, the heart night symbolizes the dragon heart, and the tail night and the skipping night symbolize the dragon tail.

Corresponding to international constellations, Seven Nights of the Black Dragon is distributed in Virgo, Libra, Scorpio and Sagittarius. Among them, Jiao Su and Kang Su are in Virgo, Lao Su is in Libra, Su Fang, Xin Su and Su Wei are in Scorpio, and Ji Su is in Sagittarius.

"In winter, the' Black Dragon Seven Nights' disappeared under the horizon and disappeared after dusk. Every day after the beginning of February in the lunar calendar, at dusk, corner beams appear from the eastern horizon. At this time, the whole body of the black dragon is still hidden under the horizon, and only the horns are exposed, so it is called' the dragon looks up'. "