Meaning: Kun: the legendary name of a big fish. Change: change. Peng: The legendary big bird.
This sentence comes from Zhuangzi's Happy Travel. Zhuangzi yearns for and pursues the absolute freedom of inaction (independent of external objective conditions) and denies the limited freedom of inaction. In Zhuangzi's Free Travel, he described a huge flying Dapeng bird to prove that everything in the world is waiting for us.
Zhuangzi believes that everything in the world, big or small, high or low, has to wait before it can operate, but it has not gained absolute freedom and reached the realm of freedom. For example, Goose Drive, Scorpion and Pigeon, Long-lived Ghost, Toona sinensis, Short-lived Auricularia auricula and Cockroach all rely on external objective things to obtain their own living conditions and space, so they all have something to wait for.
The Kun fish turned into a bird is surprisingly large in size, "flying in anger, with wings hanging like clouds". When flying to the South China Sea, "water blows three thousand miles, and those who soar are nine Wan Li". In Zhuangzi's eyes, such a huge and healthy flying bird needs strong winds at sea to soar to the clouds, so it is not really free.