This sentence is not a song, but a saying.
"The second boss is better than the little daughter-in-law" means: the second boss has a more prominent status and a smoother style of dealing with people. He handles people well and gives people a gentle, delicate and trustworthy feeling. feeling. "The second boss is better than the little daughter-in-law" is a idiom that can be used to describe those who are good at handling interpersonal relationships, behave appropriately, and have leadership skills.
Usually have good communication and coordination skills, be able to handle various complex situations, and behave very appropriately and thoughtfully in dealing with others.