In "Zhou Li Chunguan", musical instruments are divided into eight categories: gold, stone, earth, leather, silk, wood, gourd and bamboo, which are called eight tones. It is also one of the earliest classification methods of musical instruments.

Golden sounds include chimes, special bells, and cymbals

Stone sounds include chimes and special chimes

Local sounds include xun

Ge sounds Including drums

Silk sounds include guqin and guzi

Wooden sounds include 混, 敔

叏 sounds include sheng and yu

Bamboo The sounds include Xiao, Di, Guan and Chi

What we call silk and bamboo today is the abbreviation of silk and bamboo.