It refers to the fact that although a man is free and easy, he indulges in vocal music. But there is still great ambition.

The ambition of a swan

It is often used to describe people with lofty ambitions. In "Historical Records·Chen She Family", "A sparrow knows the ambition of a swan" means "How can a swallow or a sparrow know the ambition of a swan?" Due to the popularity of the new "Three Kingdoms" and because "Chen She Family" is a junior high school text, the saying "A sparrow knows the ambition of a swan" has been widely circulated for thousands of years and is regarded as a popular quotation on the Internet. .