1. Labor Ballads: The themes of elegant songs in The Book of Songs are basically labor, love, ancestor worship and war, mainly northern folk songs.
2. Palace Music Songs: In the 6th century BC (the end of the Spring and Autumn Period), the editors of The Book of Songs compiled the collected folk poems of various countries into a book, marking the emergence of China's first poetry collection.
3. Songs of the South: In the 4th century BC (the end of the Warring States Period), outstanding poets such as Qu Yuan and Song Yu appeared. They wrote in the style of Chu Ci, and Qu Yuan wrote new poems such as Li Sao, Nine Songs and Nine Chapters, which laid the foundation for the formation and development of Chu Ci.
I hope the above information can help you. Please feel free to let me know if you have any other questions.