What were the contributions of the zhou dynasty in ancient china? (they were one of the many dynasties in china beginning in 1045 b. c.)

Zhou dynasty took over from Shang after defeating them in the Battle of Muye in 1046 BC. They governed significant part of China till 771 BC when their emperor was defeated and killed in battle. The first 275 years of their reign is known as the Western Zhou period. After the 771 BC defeat, the Zhou moved their capital eastwards beginning the Eastern Zhou dynasty. During the Eastern Zhou period, the Zhou emperor was only the nominal and ritual head while the real power resided with the feudal chiefs of various states. This period is further divided into the Spring and Autumn periodfrom 771 to 475 BC and the Warring States period from 475 BC to 221 BC. The Zhou lost all power after being defeated by the Qin state in 256 BC. Their reign of 790 years is the longest.