Beiming, Beihai, is a very small sea area. Kun didn't want to bury his ambition here, so he turned into Peng, the legendary big bird. Fly to the south and seek your own ambition. Because Nanming is the legendary Tianchi Lake. In fact, it is only a legend that Kun turned into Peng and left Beiming to fly to Nanming. This sentence comes from Zhuang Zhou's "Happy Travel". And this allusion is only a manifestation of Zhuang's intention to announce the country.
Kun refers to a legendary big fish in the North Sea. The size of Kun is unknown; The wings that can be turned into birds are like clouds on the horizon, and Peng migrates to the southern sea with the stormy sea. There is a book devoted to strange things called Qi Xie.