In Chinese mythology, Joseph Campbell identifies four benevolent animals Si Ling 四靈 that took abodes in the gardens of the palace of the Chinese Empire during the legendary period of the Yellow Emperor.
The image might be an opposite of the "Four Perils" Si Xiong zh:四凶, ambiguously described in the classics as the monsters of the early age, barbarians, or assistants and progenitors.
Animal imagery was related to the four cardinal directions (Four animal symbols), however, the relationship was not stable until canonization in Han period. Thus, Rong cheng shi, a 4 c. BCE excavated text, refers to the snake as a symbol of the South, bird, of the North; and bear, of the center. East and west were symbolized by the sun and the moon. All the symbols appeared on the banners created by Yu the Great ([1]).