choose d or f key. The D-key flute belongs to the Qu Di in the flute department. It has a mellow tone, a long and thick flute body, and a low and soft pronunciation, and is suitable for playing beautiful and lyrical silk and bamboo music or light music. Compared with the D-tune flute, the F-tune flute has a thinner and shorter body, a loud and clear pronunciation and a crisp and gorgeous timbre. It belongs to the high-pitched bangdi in the flute department and is suitable for playing light, smooth and jubilant folk music, such as the new songs of Mongolian herdsmen and the spring of Pamirs in Xinjiang. Bangdi can also play various operas, such as Henan Bangzi Opera. It's best to buy Qu Di in D key, because Qu Di is less laborious than playing a flute, and is more suitable for beginners with low vital capacity.