Regarding the transition of the cucurbit flute, the following is an example of playing the cucurbit flute from the key of C to the key of G (the drum tone is 1) to explain it for everyone.

The cucurbit in the key of C is converted to a barrel tone and played as 1, that is, the G tone is sung as (1, do), and the 7 and 1 of the C key are sung as the 3 and 4 of the G key, and the chromatic scale has not changed. 3 and 4 in the key of C become 6 and 7 in the key of G; between 6 and 7, it becomes a whole tone, and between 7 and 1, it becomes a semitone. When playing, 7 in the key of G is played by #F, and the fingering is different. This will ensure that between 6-7 is a whole tone, and between 7-1 is a semitone.

That is: the pitch of 567123456 in the key of C is equal to .

The pitch of 123456712 in the key of G.

From this it can be seen that:

After the cucurbit flute and bawu are tuned, keep the roll-call bass between 7-1 and 3-4 semitones, in line with the twelve equal temperament. Under normal circumstances, or most transposition performances also meet this requirement. The whole tone and semitone of Hulusi are determined according to the twelve equal temperament and roll call. If it is a sound, it will not produce that effect. This is why, apart from the range of sound, you should prepare several cucurbits of different tunes.