东周 (Eastern Zhou) is a historical period in ancient China that lasted from 770 to 256 BCE. It is divided into two main sub-periods: the 春秋 (Spring and Autumn) period and the 战国 (Warring States) period. This era is characterized by the decline of the Zhou dynasty's power and the rise of various feudal states, leading to significant political and social changes. During the 东周 period, philosophical thought flourished, giving rise to influential schools such as 儒家 (Confucianism) and 道家 (Taoism). The constant warfare among states during the 战国 period also spurred advancements in military strategy and technology, shaping the future of Chinese civilization.