ABSTRACT
It was not until after the Zhou Dynasty overthrew the Yin Dynasty that feudalism was completed, for the former implemented the feudal system with its political power and carried out feudalism at the core of social organisations. This chapter discusses the social conditions during that period. The residents of each feudal territory once ruled by the Yin Dynasty naturally became the subjects of new princes and were not allowed to migrate. The people living in those territories would be considered during the measurement of fields. Even referring to the bronze inscriptions which recorded the enfeoffment of the San family, the exact sizes of feudal territories cannot be determined. The sizes of feudal territories underwent tremendous changes and even changed beyond recognition in the Spring and Autumn Period, when states were constantly annexing and invading each other. It is impossible to base the exact sizes of territories on historical conditions which were ever-changing.
