your problem is that you didn't open your throat and it leaked.

If you don't open your throat, you won't be able to reach the high-pitched area through the transition melody when you sing from the middle-pitched area to the high-pitched area, and what you call "a high-pitched voice becomes so sharp" will appear.

it's not easy to open your throat. First of all, you should stabilize your Adam's apple in the position where you start yawning and inhaling, which is lower than usual. Many people yawn. What we want is the inspiratory position when yawning is started, because it is mild and comfortable at this time, and the throat is very comfortable. The state is just right! Not only opened the throat, but also not too much. The Adam's apple is down, and the throat is open. It's not very easy to hold it steady when singing, especially when singing in high notes. The gap between ordinary fans and well-trained singers begins here.

your air leakage problem is related to the above problems. Try to open your throat and practice the "I" vowel (Chinese "clothes") more, which is good for vocal cord closure. In addition, the vocal cords are not closed well, and you can practice skipping more. Of course, the collocation of breath and vocal cords and the quality of collocation are not only for you, but also for many people.

come on! * * * encourage.