What is the introduction of musical instrument?

Lu's introduction is:

Lu is a unique closed-mouthed wind instrument of the Han nationality, with a simple and simple tone, which is the closest to the Taoist nature. It occupies an important position in the history of primitive art in the world.

Yun originated from the labor and production activities of Han ancestors. It may have been made by ancestors to imitate the sounds of birds and animals to trap prey. Later, it evolved into a simple musical instrument with social progress, and gradually increased the sound hole, and developed into a melodic instrument that can play tunes.

the development of Lian:

Lian has gone through a long period. About four or five thousand years ago, Lian developed from one sound hole to two sound holes, which can play three sounds. After entering the slave society, Yan has been further developed. A few years ago, Yan from the late patriarchal society to the early slave society was unearthed in Huoshaogou, Yumen, Gansu Province. It has three sound holes and can play four sounds.

by the late Shang dynasty, more than 1 BC, Yu had developed into five sound holes and could play six sounds. By the Spring and Autumn Period more than 7 years before BC, there were six sound holes, which could blow out the complete pentatonic scale and heptatonic scale. It took more than 3 years to develop from one sound hole to six sound holes.