image is a derivative work of the following images: File:Territories_of_Dynasties_in_China.gif licensed with Cc-by-sa-3.0-migrated, GFDL 2008-06-10T02:16:34Z
Source ZhouDynasty1000B.C. from "The Chou Dynasty, 11th-9th Centuries B.C." Warring States 350 B.C. from "The Contending States-Boundaries of 350 B.C."