A man wrote a song. One Mr. Zhang wants to pay for his song, and the other Mr. Li wants to pay for his song.

But if Mr. Zhang doesn't want others to sing this song again, then buy out the copyright of this song. Usually the price is very expensive, hundreds of thousands. After that, if someone wants to sing this song again, he must pay Mr. Zhang.

In short, whoever owns the copyright has the right to use it, while others have to pay him if they want to use it.