info about bone whitsle: https://wenku.baidu.com/view/fb2d73e86294dd88d1d26b07.html
info about taoun: http://blog.sina.com.cn/s/blog_517848220100cvkx.html
info about taoxun:http://www.people.com.cn/h/2012/0723/c25408-2284080944.html
info about bells http://www.cnhubei.com/ctdsb/ctdsbsgk/ctdsb47/201303/t2507796.shtml
Story of YU :http://www.kekenet.com/read/201510/407407.shtml
Zeng-hou-yi BellsThe Bianzhong of Marquis Yi of Zeng: http://wenda.tianya.cn/question/7d59499dad5f1f96AN
An online book named history of chinese music : https://yuedu.baidu.com/ebook
/5cd2ee44a55177232f60ddccda38376bae1fe076?_searchquery=%D6%D0%B9%FA%D2%F4%C0%D6%BC%F2%CA%B7
An online book history of chinese music https://yuedu.baidu.com/ebook/96168c90cf84b9d528ea7aec
Qin and han dynasty:https://wenku.baidu.com/view/a8870ad3700abb68a982fbb0.html
Poem A pledge picture from :https://baike.baidu.com/item/%E4%B8%8A%E9%82%AA/1270334?fr=aladdin
poem from :https://baike.baidu.com/item/%E4%B8%8A%E9%82%AA/1270334?fr=aladdin
Yanyue music video:https://www.youtube.com/watch?v=pvputqJUFrs
Chinese lute :https://wenku.baidu.com/view/beecfd6530b765ce0508763231126edb6e1a7648.html
Revolutionary folk songs info: https://zh.wikisource.org/zh-hans/%E5%9C%8B%E6%B0%91%E9%9D%A9%E5%91%BD%E6%AD%8C
https://en.wikipedia.org/wiki/Political_music_in_China
pop music:https://wenku.baidu.com/view/09ac13ee9a89680203d8ce2f0066f5335a81676f.html
https://wenku.baidu.com/view/43c5f80acec789eb172ded630b1c59eef8c79ab7.html
https://www.youtube.com/watch?v=M07lClhzWbw