There are two ways to sing high notes:

1. Use the Dantian easily. Easily use the Dantian and the sound cavities of the body (thoracic cavity, nasal cavity, throat cavity and head cavity). Too tight and you won't be able to sing high notes because you've locked your throat. Singing with Dantian can also raise some high notes that are difficult to sing, and your throat will not hurt when you sing.

2. Proper breathing and posture. Keep the shouting posture and sing high notes, first put your hands on your waist (don't pay attention to your abdominal muscles at this time, it will work naturally when you inhale), inhale around the waist, and feel the front and back Inflate your waist, then close your breath (open your mouth wide), pull your waist and ribs inward, and push your chest upward before you can sing.

Extended information:

Treble, a musical term, here refers to a singing method of real voice; treble is always the core issue in singing, and it plays a certain role

It represents whether a singer is capable; as long as the vocal skills are practiced scientifically, everyone can have the ability to sing high notes.

Generally, men’s vocal range ranges from C1 to C5, and the lowest male pitch is C1. Only a handful of men in the world can reach the C1 pitch, or even the second lowest pitch. Low C is a negative value. The true treble of a male does not exceed C5, and the most talented male will not exceed C5, such as Adam Lambert.

Due to their short vocal cords, women can naturally sing higher, with a vocal range of C2-B5. The high-pitched part here refers to the real voice, and the vocal cords vibrate across the board

Singing method; men are better than Women's physiological range is one octave lower than men's. Similarly, women's vocal range is one octave higher than men's. This is the concept of equivalence. Singing is an art. You cannot judge a singer just by looking at high notes. Whether it meets the standard depends on his overall ability to control the work.

Reference: Baidu Encyclopedia "Treble"