Suona, also known as the horn, and the small suona is also called the sea flute.
Suona, with eight holes (seven in front and one in back) on the conical wooden tube, has a fine copper tube at the top, which is fitted with a bellows reed. There is a copper bowl-shaped amplifier at the top of the wooden tube. Although the suona has eight holes, the seventh hole's sound is the same as the tube's overblow sound, and the eighth hole's sound is the same as the first hole's overblow sound.
In modern national orchestras, the suona has also been continuously developed and improved. The current reformed varieties mainly include suonas with keyed high pitches, keyed medium pitches, keyed sub-medium pitches, and keyed low pitches, etc. These innovations have expanded the suona's range of performance, making it easier to transpose, and have enhanced the expressive power of the suona group in the orchestra.