China classical musical instruments are classified by what?

China's classical musical instruments are generally classified as "eight tones".

"Eight tones" is a method for China to classify musical instruments according to their manufacturing materials. The musical instrument in this "Eight Tones" was later called "Old China Music" or "Old China Instrument", which means pure Chinese musical instrument, mainly to distinguish it from foreign musical instruments. It first appeared in Zhou Li, Chun Guan, and was divided into eight categories: gold, stone, earth, leather, silk, wood, baa (páo) and bamboo.

Such as gold: actinide (bó), parallel and osmium (náo).

The stones are: Qing,

Soil types are: Yi (xn) and Yi (XN).

Leather includes: Tibetao.

Silk includes: Qin, Qin, Zheng and Zi Ji.

Wood types are: Zhang ()

Categories are: Fu, Sheng,

Bamboo includes air, flute and flute.