What are the seven nights in the north?

There are 56 constellations and more than 800 stars in the northern seven nights, which form the image of snakes and turtles, so it is called "Xuanwu".

The first bucket element of Xuanwu Yuangui in the north is composed of six stars and looks like a bucket. Generally known as "Southern Fight", it is in charge of life and death together with Beidou, also known as "Temple of Heaven".

Taurus has six stars, shaped like an angle. The four-star female dormitory is shaped like a dustpan.

The Pleiades is one of the four stars in the Temple of Shu Yao, also known as "Heaven", which is quite ominous. In ancient times, the empty star dominated autumn, which contained the image of chilling cicada, and everything withered, which was really sad.

It is also unlucky that there are grave constellations, empty beam constellations and house constellations in dangerous houses, which reflects the inner uneasiness of the ancients in late autumn and winter.

Guest rooms are also called "Xuangong", "Qingdian" and "Xuanming". Their appearance tells people to strengthen their rooms to survive the severe winter.

The wall snail is similar to the ventricular snail and may contain the meaning of strengthening the courtyard wall.