The imperial army recovered the famous sentence on both sides of the Yellow River.

Sing my songs loudly, drink my wine,

In the green spring, I began to go home.

"Singing in Baishi requires drinking, and let me go home in green spring" is a couplet to further express "ecstasy". "Whitehead" points out that people reach old age. Old people rarely "sing" and should not "indulge in wine"; Nowadays, we should not only "sing" but also "indulge in wine", which is a concrete manifestation of "ecstasy". This sentence was written in a "crazy" state, and the next sentence was written in a "crazy" thinking. "Youth" refers to spring. Spring has arrived, and it is time to "go home" with his wife and children among flowers, birds, fish and insects. Thought of here, how can you not be "ecstatic"!