Basically, the Zhou Dynasty separated into two periods West Zhou (1046-771 BCE) and East Zhou (770-256 BCE). The Zhou court extended its power over the eastern plain by granting authority to members of the royal family and in some cases to favored adherents, who established walled forts supported by garrison troops among the original habitants of the east. By 700 BCE, the state of Qin in the west, Jin in the north, Qi in the east and Chu in the south were the main centers of power in China.
(credits for wording: ancient.eu/Zhou_Dynasty)
I hope this helped!
~Travis
