You can also have the knowledge of Chinese musical instrument on such sites:
http://french.china.org.cn/french/181835.htm
or you can search in Google inputting such:
中国民族乐器or中國民族樂器
Chinese Traditional Musical Instrument, or their equivalent translation in other languages that you know.
Info also in Wikipedia:
In Chinese of the Instrument:
http://zh.wikipedia.org/wiki/%E4%B8%...B9%90%E5%99%A8
In Chinese of the Musics:
http://zh.wikipedia.org/wiki/%E4%B8%...9F%B3%E4%B9%90
And another Chinese version, website of Traditional Chinese Musical Instrument [中国民族乐器网]:
http://www.cnnmi.com.cn/index.asp
you can try every button on every page, knowing Chinese is better!