"Muge is quiet, smiling and floating." What is the origin of this poem?

From "Come Out, Sweetheart Queen"

I like walking, I like silence, and I prefer to sit by the bridge and drink tea alone. I regard the pedestrians on the bridge as scenery, so I also smile at me in the scenery. "Mu Ge Jing Bay, Xiao Xiao Fu Sheng" is my favorite lifestyle and the best blessing I can think of. Listen quietly to the music in the deepest part of your soul. Even if there is no sound, as long as you are listening, you are music. The song is not moving, but it has its own realm. What you can't hear or think of. I can't hear, I can't think, so I will be born in a flash. Looking at mountains is mountains, looking at water is water, and smiling quietly is a hundred years of life.

Pillow a cup of tea and listen to the rain all night. And enjoying all this alone, this kind of beauty is hardly pleasant and happy. The water vapor, rain and fog in the cup interweave a different kind of scenery.

This sentence shows an indifferent attitude towards life.