I want to buy a book of Songs of the South, which version is better and suitable for understanding the content level of the article?

If you want to buy professional books, you must look at the publishing house. Version is very important. If quality is required, the best ones are Zhonghua Book Company and Shanghai Ancient Books Publishing House. As for the edition, it is difficult to buy the first edition or early edition now, so if you don't require it, the general edition is ok, but the publishing house must choose it. In addition, the translator is more important. There is a green hardcover version of Songs of the South. I forget which publishing house it is. That one is ok. If you want to be serious, just look for some research books. Help to understand and even learn.