What do you mean this blessing is only in the sky, and it is rare for the world to rejuvenate?

This song should only exist in the sky. How many times can the world listen to it?

Du Fu's poem comes from Du Fu's "Giving Flowers"

I don't want to explain. Literally, this kind of happiness can only be found in the sky, just like there are few beautiful springs on earth. This thing or thing should not exist in the world, extremely rare and precious.