1, the four great beasts are Qinglong, Baihu, Suzaku and Xuanwu. Qinglong is the God of the East; White tiger is the god of the west; Suzaku is the god of the south; Xuanwu is the god of the north, and the tortoise and snake are one. Therefore, there are "Qinglong, Baihu, Suzaku, Xuanwu and Tiansi Spirits, with the square as the square, and the king makes the palace pavilion and the palace pavilion." .

2. The ancient ancients divided the sky into four palaces, east, west, north and south, named after Qinglong (black dragon), White Tiger, Suzaku and Xuanwu (a turtle-shaped god). In fact, the sky is divided into four parts, which are connected by seven main stars in each part and named after their shapes.

3. The horn, horn, room, heart, tail and dustpan of the East Palace are shaped like dragons, so the East Palace is called Qinglong or Black Dragon.

The seven western stars, Kui, Lou, Stomach, Ang, Bi, Horn and Shen, are shaped like tigers, calling the West Palace the White Tiger.

The well, ghost, willow, star, Zhang, wing and net in the south are bird-shaped, called suzaku;

The northern seven-star bucket, cow, female, empty, dangerous, houses and walls are shaped like turtles and called Xuanwu.