What are the practical and unique minority musical instruments?

Kazudi is an ancient musical instrument, which belongs to the air-sounding instrument in wind instruments and is often played in celebrations or special festivals. As long as the performer can hum songs, he can play on Kazudi, and he will soon master the playing skills. You don't need to learn music theory, recite music scores or even practice to play kazudi. Kazudi sounds like saxophone and trumpet. It can be played at any time and is a guest instrument performed by many foreign musicians and singers. Kazu flute has a simple structure and the membrane can be replaced (plastic packaging and flute membrane can be replaced). Kazudi has a big head and a small head. When playing, he put his big head in his mouth and hummed the tune with his voice instead of blowing. The vibration of the vocal cords drives the sound membrane on the kazudi to vibrate to produce sound.