Beetle? At first glance, it is the brand of Dunshan ... when you play the trumpet, you shouldn't bulge your cheeks. Inhaling is a bad habit. Just like singing. Inhalation in dantian is prone to misunderstanding. It is best to find a professional teacher to tutor the trumpet brand. Every brand has many different people. Bach Yamaha Wei b/ S are all very good instruments, but the timbre of each instrument is different, which can only be different from person to person. Please add QQ482 16447 for specific questions.