Each of the creatures is most closely associated with a cardinal direction and a color, but also additionally represents other aspects, including a season of the year, an emotion, virtue, and one of the Chinese "five elements" (wood, fire, earth, metal, and water).

In the tomb, labeled M45, immediately adjacent to the remains of the main occupant to the east and west were found mosaics made of clam shells and bones forming images closely resembling the Azure Dragon and White Tiger, respectively.

According to that document, Yu the Great gave directional banners to his people, marked with the following insignia: the north with a bird, the south with a snake, the east with the sun, the west with the moon, and the center with a bear.

[2] The Chinese classic Book of Rites mentions the Vermillion Bird, Black Tortoise (Dark Warrior), Azure Dragon, and White Tiger as heraldic animals on war flags;[3] they were the names of asterisms associated with the four cardinal directions: South, North, East, and West, respectively.

The Azure Dragon is named Meng Zhang (孟章), the Vermilion Bird is called Ling Guang (陵光), the White Tiger Jian Bing (監兵), and the Black Tortoise Zhi Ming (執明).