China feudal ancient books refer to

The word "feudalism" first appeared in China's traditional classic "The Book of Songs, Shang Dynasty". "Living in the next country, feudal happiness" means sealing the country. It shows that at least in Shang dynasty, there were measures to grant nobles fiefs in the name of the emperor and establish vassal States loyal to the royal family. However, the feudal system really developed and matured in the Western Zhou Dynasty. The Emperor of Zhou enfeoffed the imperial clan and heroes of Ji surname to all parts of the world, which greatly expanded the territory of the Xia Dynasty and made the Xia civilization brilliant.