The Four Symbols (Chinese: 四象; pinyin: Sì Xiàng, literally meaning “four images”), are four mythological creatures appearing among the Chinese constellations along the ecliptic, and viewed as the guardians of the four cardinal directions. These four creatures are also referred to by a variety of other names, including “Four Guardians”, “Four Gods”, and “Four Auspicious Beasts”. They are the Azure Dragon of the East, the Vermilion Bird of the South, the White Tiger of the West, and the Black Tortoise (also called “Black Warrior”) of the North. 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, a virtue, and one of the Chinese “five elements” (wood, fire, earth, metal, and water).
Source: Four Symbols – Wikipedia