What is the classification of traditional Chinese musical instruments according to the materials used to make them?

As early as the pre-Qin period, Chinese traditional musical instruments have been based on the material used to categorize the classification of musical instruments, then known as the "eight sounds". Such as bells, bells, gongs, bells, gongs, etc. made of metal, categorized as "gold" category; chime, chime, etc. made of stone, categorized as "stone" category; ocarina, percussion, etc. made of fired clay, categorized as "earth" category; rattle, rattle, rattle, etc., categorized as "earth" category, categorized as "earth" category, categorized as "earth" category, categorized as "earth" category. The drums were made of animal leather and were classified as "leather"; the qin, zither, zheng, pipa, huqin, etc. were made of silk strings and were classified as "silk"; the percussion instruments were made of wood and were classified as "wooden fish"; and the percussion instruments were made of wood and were classified as "wooden fish". etc. are made of wood, categorized as "wood"; sheng, yu, reed fungus, etc. are made of gourd or wooden ladle for pronunciation **** sounding bucket, categorized as "lagenaria"; chi, xiao, flute, etc. are made of bamboo pipe, categorized as "bamboo"; thus, "lagenaria" is categorized as "bamboo", so that "bamboo" is categorized as "bamboo". "class, so" gold, stone, soil, leather, silk, wood, Lagenaria, bamboo "*** eight categories, so called" eight sounds ". This classification started in the Zhou Dynasty ("Zhou Li - Spring Officials - Masters"), continued at the end of the Qing Dynasty, to the modern era to be replaced by another classification.