The mouth shape when playing suona is a very important part of suona performance. Mouth shape refers to the shape of the lips and the part containing the whistle when playing the suona. It is related to the pitch, timbre, sound quality, strength and other lip skills in the suona performance.

The general mouth shape for playing suona is: the reed is located in the middle of the lips, the upper lip is about a quarter of the reed near the base of the whistle, and the lower lip contains the whistle about one-third or two-thirds (two-thirds of the reed). In the process of playing, the control strength of the mouth shape should change with the change of the blowing strength, volume, timbre and technique.

During the initial practice, the mouth and cheeks will feel sore and weak, and there will also be a correct pronunciation, noise, etc., which are normal. After a period of practice, these phenomena will disappear (in addition. Do not puff your cheeks when playing). The standard for passing the mouth kung fu is: in the case of playing for a long time, the whistle is controlled freely, the lips are not sore or tired, and the basic skills are passed.