The night flute is made of a knotless thin bamboo tube. The tube is about 50 cm long, with an outer diameter of about 11 mm and an inner diameter of about 7 mm. The lower end of the tube has 4 sound holes, and the upper end is a mouthpiece for vertical blowing. On the front of the mouthpiece, there is a rectangular notch for clipping the reed, which is mostly made of thin bamboo or reed. There is a semi-arc notch on the back of the mouthpiece. When playing, the airflow enters the tube from the arc-shaped gap and vibrates the reed to produce sound.

The upper end is slightly thicker, hollow without joints, and both ends are transparent. The length of the tube is 50 cm to 60 cm, the outer diameter of the upper end nozzle is 1.1 cm to 1.2 cm, and the inner diameter is 0.7 cm to 0.9 cm. First trim off 3/4 of the 2 cm long tube wall at the head of the tube to make it a whistle-shaped mouthpiece. The remaining 1/4 of the tube wall is split into two pieces along the bamboo pattern. The air inlet channel is formed by tying ropes. On the front of the mouthpiece, 7 cm away from the head of the pipe, there is a pronunciation hole with a length of 1 cm and a width of 0.5 cm. A thin bamboo or reed sheet is placed in the lower half of the pronunciation hole as an air distribution valve. The top of the pipe body is plugged with a cork or a cotton cloth, and there are four circular sound holes in the lower part of the front of the pipe body (pictured). Some also have a back hole to become a five-hole night flute.

When making the night flute, the bamboo used varies in length and diameter, so it is also divided into high, medium and low bass. However, due to the small pipe, it can only be played gently, and it can blow out two octaves.