Bangdi is used to accompany the northern Bangzi opera. The flute body is thin and short, and its timbre is high, bright and powerful. It focuses on the use of tongue skills, such as the northern folk music Bangzi and Welcome by Feng Zicun, a famous flute player. In the performance, it shows strong local color, intense use of breath, rapid tongue playing and strong overlapping sound.

Qu Di, also known as "Bandi", "City Di" or "Tie Di", is a musical instrument used to accompany traditional operas such as Southern Kunqu Opera. Because it is abundant in Suzhou, it is also called "Su Causeway".