How to blow out the sound?

Practice more and you should be able to make a sound. In fact, there is no strict difference between a work of art and a musical instrument. Generally, you can make a sound by lifting three or four holes, and the pitch is definitely not accurate, so you need to adjust it yourself. It is more difficult to lift more holes, but it is still possible to adjust the mouth shape and strength. Note that it is easier to start with the hole below. The higher the frequency, the more parallel the breath should be to the stomata. If you try this, you should be able to blow out more than two or three sounds. I don't know whether you play the flute or not, but stay away from it. In fact, I feel like blowing a mineral water bottle. If you can play the mineral water bottle, then everyone can play it, and it should be similar. Come on, don't give up. It's fun to be idle.