2. Descending: From a higher note to another lower note. Its playing method is to make the fingers fall smoothly from the higher sound hole to the lower sound hole one by one, even if the fingers gradually close the sound hole from top to bottom. At the same time, the breathing should be gradually slowed down, the throttle should be gradually increased from small to large, and the mouth strength should be gradually reduced from large to small.
3. Complex taxiing: from low to high and then to low or from high to low and then to high. Slippery notes can be recorded in two ways:
(1) indicates the pitch of the glide, and the direction and beginning and ending of the glide can be expressed by the high and low trend of the notes themselves. Record symbols between the start and stop of the sliding sound.
(2) In the case of no specified spacing, the sliding direction is indicated by the arrow.