As for word kun,the annotation of Chinese and foreign countries gives us different explanations.

The Paragon of Intercultural Communication under the Circumstance of Cultural Exchange Surplus: A Communication Interpretation of Ge Kunhua;

the huge bird was flying highly(Kun Peng Zhan Chi),Zhuang Zhou dreamed the butterfly(Zhuang Zhou Meng Die),and the cook disjointed a cattle(Pao Ding Jie Niu).

The Explanation of the Bird-like and Fish-like Figures Engraved onto the Unearthed Golden Stick in Sanxingdu——The Chinese Ancient and Wizardly Legend“Transformation of Roc”;