Other
China Today: Arts & Entertainment
Offers a great history of Chinese music. You'll find lots of good information on opera, music, dance, and instruments. Good pictures and links to more info.
Other
Peking Opera House: Introduction of Peking Opera
A great overview of the history of the Peking Opera. Includes a few links to important people and contains a picture.
State of Florida
Florida Historical Resources: Musical Brocade: Ann Yao and Zheng Music
An article on the history of the "Zheng," an ancient Chinese stringed musical instrument and how it is still used today in music performances.
Other
Music From China
Site has the history of Chinese music. You can find examples of Chinese instruments, dates, developments, and descriptions.
Other
Chinese Musical Instruments
Great pictures of music instruments from China. Includes pictures of a Guquin, Guzheng, Pipa, Erhu, Xiao, and Dizi.