Yangchun Baixue: It originally refers to a higher-level song of the State of Chu in the Warring States period, which was mainly sung by the court and was rarely seen by ordinary people. So it is used as a metaphor for profound and unfashionable literature and art. Now it is also extended to something elegant.

Xialiba people: It is also a song of Chu, but it is mainly popular among the people. Therefore, it is used to describe popular literature and art. Now it is also extended to popular and popular things.

Extended information:

The allusion of "Yangchun Baixue" comes from Song Yu's Answer to the King of Chu's Questions in the Songs of Chu.

King Xiang of Chu asked Song Yu: What hidden virtue does Mr. Chu have? Why don't people praise you so much?

Song Yu said: There were singers in the state of Chu. At first, they sang "Xialiba people", and there were thousands of peacemakers in the country. When the singer sang "yang a Xielu", there were only a few hundred middle school peacemakers. When the singer sang "Spring Snow", there were only dozens of middle school peacemakers. Its conclusion is that "its music is high and its harmony is sparse". The more elegant and complex songs such as Yangchun Baixue are, the fewer and fewer people can sing, that is, the songs are high and few.