What do you mean, "There is a kind of fish in the north called Kun, which is too big to be stewed in one pot and turned into a bird"?

This is from Zhuang Zhou's Happy Travel, but it has been spoofed since the broadcast of Big Fish Begonia.

The original paragraph of "Free Travel":

There is a kind of fish named Kun in the north. Kunda, thousands of miles away. Become a bird. Its name is Peng. Peng's back, thousands of miles away, flew angrily, his wings hanging in the sky like clouds. If it is a bird, shipping will migrate to Nanming. South ghost, Tianchi also.

Translation:

There is a kind of fish in the North Sea. Its name is Kun. Kunming is very big. I don't know how many miles it is. Kun becomes a bird, and its name is Peng. Peng Bei is thousands of miles long. When it vibrates its wings and flies directly, its wings are like clouds hanging on the horizon. This bird will migrate to the South China Sea when the wind blows the sea. The sea in the south is a huge natural pool.

Qi Xie is a book that records some strange things. It is recorded in the book: "When Peng moved to the South China Sea, flapping his wings on the water surface could stir up waves of 3,000 miles, fly around the whirlwind to the high altitude of Wan Li, and leave the North Sea by the June wind." Swimming like wild horses, flying dust and animals are all moved by the wind. The sky is boundless, is it its original color? Is it boundless? When Peng looked down, he actually saw the same thing.