When making, first of all, pay attention to the selection of materials, the mouthpiece and the sound hole must be in a straight line, and the scale must be accurate.
The structure of the flute is relatively simple. It is made of purple bamboo, yellow withered bamboo or white bamboo. The total length is 70 to 90 cm, which is slightly longer and thinner than the curved flute. The inner diameter of the tube body is 1.2 to 1.4 cm. hollow. The mouthpiece is opened on the edge of the upper end, so that the sound is developed by blowing air. In the middle of the flute, there are 5 sound holes on the front and 1 sound hole on the back, which are used to control the pitch of the sound, play the role of beautifying the sound and increase the volume, and can also be used to tie floating spikes (decorative ribbons).
The sound quality of the flute has a lot to do with the bamboo material and production. Bamboo harvested from the winter solstice to the spring equinox should be selected, and the old bamboo with a growth period of more than three years is preferred. The bamboo quality should be firm and the weight should be heavier. The purple bamboo should have uniform bamboo flowers and a purple-brown color, without moth-eaten or dry shrinkage. , split, bee waist and big belly and other defects, the tube body is complete, the texture is fine and straight.

When making, the mouthpiece and sound hole do not have to be in a straight line, especially below the key of E, the sound hole should be ergonomically opened according to the comfortable position of the fingers. The top and bottom of the mouthpiece should be round, the sound holes should be round, and all of them should be slanted inwardly. beautiful. In terms of sound quality, the scales should be accurate, and the sound should be clear and beautiful, no empty or discrepant sound. The timbre should be pure, beautiful and mellow.