Polie, a double-reed air-sounding instrument of the Zhuang nationality, is a folk musical instrument with a relatively 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.

In Zhuang Township, Longzhou, Guangxi, there is a legend circulating among the people: In ancient times, there was such a custom in the local area that after death, the meat of the body should be distributed to relatives and friends as a sign of mourning. There was a young man named Li Jie who lost his father when he was young. He and his mother depended on each other and lived a poor life. One day he went to the river to herd cattle and saw that the cow was in labor. He told his mother, and the mother said that the cow was in labor, and it was so difficult when I gave birth to you. Li Jie thought that it was so difficult for my mother to give birth to me. After she died, she had to share the meat of her body with others, which is really not right. Later, when his mother died, relatives and friends came to the house to mourn. He invited some friends to play boules and dance thunder dances in front of the house, attracting everyone to watch. Others took the opportunity to put his mother's body in a coffin and carried it out for burial. After Lei Wu danced, when the crowd came to eat human flesh, Li Jie said, my parents are our elders, they gave birth to me and raised me to grow up, and the elders cannot be treated like this after they die. The cattle and mutton prepared in advance were distributed to everyone, and everyone said that Li Jie had done the right thing and praised him for being smart and sensible. Since then, when the local people meet the funeral, they all blow waves and dance thunder dances to show their condolences. We don't have to verify the authenticity of the legend, but it shows that the Zhuang people had Polie in ancient times, and he played it in funeral ceremonies all the time.