According to the cool dog music query, I learned that "You An An" came from the song "Uh-huh An An", which was sung by the singer "Uh-huh An An", and the lyrics and composition were anonymous, and it was included in the single album "You An An".

Part of the lyrics are as follows: "There is a man who lives on a faint path. He would listen to a long ballad and then shake his head. He didn't hold a girl's hand and didn't expect anyone's tenderness. There will always be people laughing at him. He just smiles and says no. His youth is not lonely, and few fallen leaves worry about who he is always waiting for in front of the door. "