As long as the introduction sounds, it must have momentum. However, it is not loud or noisy. It can make people suddenly quiet from the noise, listening and playing. And marvel at your momentum. This requires a relatively large foundation to control the strength of the breath.
There are three places in the circulation ventilation of the tune, and the usage is not quite the same. It is best not to blow for a long time in all three places. What is needed in the introduction part is the transformation of detail control strength, and it is best to connect the low and high octaves perfectly. The next sentence, circular ventilation, is suitable for excitement, when the audience applauds, when changing bars. The last position is used for smooth expression.
You know, the artistic conception of "357" is not difficult, and the difficulty really lies in skill. If you want artistic conception, I recommend you to listen to Country Songs and Qinchuan Express Your Feelings, and compare the folk songs in northern Shaanxi. This kind of thing is really confusing for a while.