I am a singer, reserve, Yang Zongwei, what is the instrument played by the girl on the stage

Practice method 1, hand gestures: hands cupped each other, in addition to the two thumbs in the middle of a small hole left, all other places should not leak air. 2, the mouth and hand with: hand gestures correctly, the two thumbs of the joint part of the joints gently in the middle of the two lips. 3, breath and blowing: gestures and mouth in place after the cooperation, the most with the two thumbs between the small hole gently blowing, you can hear the "oo ...... oo" sound, that is, the basic sound. If there is no sound, then check against the above two, and then blow again, until blowing a stable sound, the basic skills initially practiced. 4, the scale of the blowing: in can freely blow a tone on the basis of the tone as 1/3/5 in any one of the tone, for upward or downward scale practice. Change the pitch by adjusting the opening and closing of both hands, the outer one. When you can play a steady interval of one octave, congratulations, you are ready to try playing a familiar melody! Commonly used practice pieces Suwu Shepherds Goat, Meng Jiangnu, Burial of Flowers, Dream Chaser, Two Tigers, Jingle Bells, etc.