This is a way to write the title of an article. Cher is one of the Analects of Confucius, and it is written in many ways. Generally used to quote the original source. The dot is used to distinguish the title of a book from an article. For example, if you write a book, the title is XXX, and the third chapter is YYY, you can write XXX YYY like this when quoting.
I hope it helps you, thank you!