Polie is a double-reed gas-sounding instrument of the Zhuang nationality. The Zhuang language is also called Bilie and Bielie. In Zhuang language, "wave", "bi" and "bie" all mean blowing, and "column" means pipe, which means blowing pipe. The Han people call it the Zhuang Suona. It is a folk musical instrument with a long history. After reform, it has become an excellent solo instrument with beautiful timbre and expanded range. Popular in Longzhou, Ningming, Pingxiang and Nanning in Guangxi Zhuang Autonomous Region.

Polie's pronunciation is euphemistic and pleasant, softer and more beautiful than the suona, crisper and brighter than the oboe, a Western musical instrument, with a unique timbre and a strong local flavor. Often used as a soloist or to accompany folk songs and dances.

Every Zhuang folk wedding or funeral occasions, they have to play the bolet, and dance while playing.