A complete note can be subdivided into three parts: onset, belly and tail. The sound head refers to the initial part of each sound, which is mainly composed of breath, tongue, and tone of voice.

To distinguish the quality of pronunciation, we mainly start from the beginning of the sound. To distinguish the quality of pronunciation, we can consider the following aspects. First, the pronunciation is clean, mainly relying on the proper coordination between the breath and the tongue. Whether the out of breath and the withdrawal of the tongue are at the same time, if not at the same time, then it will cause the problem of uneven pronunciation and polyphony. Secondly, a good pronunciation will sound relaxed and elastic, otherwise, it will feel tight and rigid. Good sound quality and timbre means less irrelevant noises. This requires using your own hearing ability, paying attention to identification, and also paying attention to control the tail sound so that the tail sound is clean and neat!