Was the Western Middle Ages a feudal society? The feudal society here refers to the society corresponding to the slave society, not the meaning of enfeoffment.

Yes, the Middle Ages in the West was a feudal society, and the feudalism in Europe was a real feudalism, which meant to seal the country. The feudal king subcontracted the land to the lords, and the lords subcontracted the land to the big feudal lords, and the big feudal lords subcontracted the land to the small feudal lords, and the small feudal lords leased the land to farmers. The land was subcontracted layer by layer, and the management could not go beyond the level. There is a saying in Europe that "a minister is not a minister", which means that you can only control your subordinates, but not your subordinates. The enfeoffment system in Europe is the most typical feudal society. On the contrary, China's feudal society was centralized. We have never heard that the emperor subcontracted the land to ministers and let them manage it themselves. Our enfeoffment system was implemented in the Zhou Dynasty, but the Zhou Dynasty was classified as a slave society by history. I think the way we divide it now is actually very problematic, and it is entirely for the sake of corresponding to Europe. In fact, the historical development of China has its own characteristics, and it is absolutely unnecessary to arbitrarily label every period of history as a slave society or a feudal society in order to correspond to Europe.