I don't know where this poem was written, because it is in the Book of Songs and has a history of thousands of years. I don't know who wrote it and under what circumstances. However, this is a folk song in the national style, which may have been created by the ancients during their labor.
Confucius said, "Three hundred poems, in a word, are innocent". He said that this poem was written by the ancients to express their desire for a wise monarch. I think it's bullshit. This is a folk song, so pure and full of beautiful love. Why does it have to involve political ideals or something? Are you tired?