Zheng

Zheng (; Chinese: 鄭; Old Chinese: *[d]reng-s) was a vassal state in China during the Zhou dynasty (1046–221 BCE) located in the centre of ancient China in modern-day Henan Province on the North China Plain about 75 miles (121 km) east of the royal capital at Luoyang. It was the most powerful of the vassal states at the beginning of the Eastern Zhou (771–701 BCE), and was the first state to clearly establish a code of law in its late period of 543 BCE. Its ruling house had the ancestral name Ji (姬), making them a branch of the Zhou royal house, who held the rank of Bo (伯), a kinship term meaning "elder".