Are poems, songs, poems and songs all poems?

In ancient China, unhappy people were called poems and happy people were called songs. Later people call it poetry. Therefore, the expression of poetry has a broad concept. Needless to say, poetry is a typical chorus, but it is actually a song of the Song Dynasty. Fu, Bi and Xing are the three main forms of expression in The Book of Songs. Ci is a typical poetic style, represented by Qu Yuan's Songs of the South, and Qu is also a typical chorus of Yuanqu. So, all of the above are poems.