What do you mean by "pine, laugh and watch a feather fly"? Explain?

Although Liang Yusheng writes martial arts novels for a living, what he really likes is not fighting and killing, but chess and couplets. Mr. Liang himself said: "Although I don't write as many books as martial arts novels, I'm afraid I spend more time and energy on martial arts novels when it comes to data collection and research." 10 years ago, he made a couplet to tell his heart, and asked Chen Wenjie, a Hong Kong calligrapher, to write it and hang it in the house. Lian Yue said, "Scattering firewood and chopping firewood, laughing at a feather flying; People do nothing in different places and spend their lives in the sea. " Therefore, what you need to know is "a feather floating in the clouds with a smile", which means a realm of life that Liang Yusheng yearns for.