What is the key of the small lock na playing Jin opera

A key. The folk local suona in northern Jin is divided into three kinds of A key large suona, C key medium suona and E key sea flute. One of the most distinctive is the A key large suona. This kind of suona is used in the blowing and beating music of Jinbei Drum and Blow Music. Its body is made of cypress wood with eight holes, seven in the front and one in the back. The bore is larger, the wall of the pipe is thinner, and the dip is thicker than that of other places.