Suzhou has one-on-one harmonica training classes. Address: near Xinghu Street 166, Suzhou Industrial Park. Harmonica, a small wind instrument, is a multi-reed instrument, which makes the metal reeds vibrate and sound by blowing or inhaling through the mouth. In the classification of musical instruments, it belongs to wind instruments with free springs. Its sound source is a reed with a length of 1.5 to 3.5 cm, not an air column (such as a flute). Harmonicas are mainly divided into solo harmonica and ensemble harmonica, each of which has different types. Its range is slightly different according to the type and tonality. As a melody instrument, the harmonica can play at least two chords, and a high-level musician can play two relatively independent parts at the same time under the premise of following the harmonica structure. Because of its small size, it is called the piano in the pocket.