Incoming links: Warring States period
www.facebook.com/131402556881886/posts/655763214445815/ gives an origin:The silkqin.com entry: www.silkqin.com/04qart/07sqmp/57ls.htm does not mention this however.
Li Sao was composed by Cheng Kangshi in late Tang dynasty based on the poem Li Sao, authored by Qu Yuan (340-278 BC) in the Warring States period of ancient China.
Li sao performed by Guan Pinghu
. Source. Track from Master Of Traditional Chinese Music: guqin