The Eastern Zhou (/dʒoʊ/; c. 770–256 BC) is a period in Chinese history comprising the latter half of the Zhou dynasty, following the Western Zhou era and the royal court's relocation eastward from Fenghao to Chengzhou (near present-day Luoyang). The Eastern Zhou was characterised by the weakened authority of the Ji family, the Zhou royal house. It is subdivided into two parts: the Spring and Autumn period (c. 770 – c. 481 or 476 BC), during which the ancient aristocracy still held power in a large number of separate polities, and the Warring States period (c. 481 or 476 – 221 BC), which saw the consolidation of territory and escalation of interstate warfare and administrative sophistication.