2; Series 3 is a student series, 4; 5; 6, 7 is a major; 8; 9 is customized.

Trumpet, also known as trumpet, is one of the brass instruments. Of all the brass instruments, the trumpet is the highest in pronunciation and sound. Trumpets use the treble spectrum of staff to record music. Play fixed roll call, that is, the concept of fixed pitch. There are many kinds of trumpet in B-flat, D-flat, E-flat, F-flat, G-flat, A-flat and B-flat, which are determined according to the high notes of the first overtone series. The trumpet we usually use is in B flat. If the trumpet plays the same melody as the piano, electronic organ and other C-key instruments, the trumpet must be improved by two degrees, that is, the performance of C-key instruments.