If you are really into classic Chinese folk music as i am, then you have to check out the beautiful voice of Chinese singer 童 麗 Tong Li. her voice is just heavenly, even if you don't understand the language you will be blown away by her beautiful singing.
Here are a couple of my personal favorites.......
孟姜女 by 童丽 Tong Li
船歌 by 童丽 Tong Li
童丽/王浩 - 杏花溪之恋
I absolutely love her voice! and i love how her songs, she has one of the sweetest voice i have ever heard.