Looking for Classical/Traditional Chinese Mandarin Vocal Music Pieces?

I'm taking vocal lessons and I really want to learn a classical/traditional Chinese Mandarin piece but I can't seem to find any online. So, I'd be really grateful if any of you could suggest any Classical/Tradition Chinese Mandarin Vocal Music Pieces. I have to be able to find it in a romanized version because I cannot read Mandarin. Also, I would prefer Soprano but I can also sing Mezzo Soprano or Alto. Thank you!