My vassal is not my vassal. What is the system?

My vassal is not my vassal, but the vassal system in western Europe.

My vassal is not my vassal, that is to say, I am only responsible for those who pay me, and no one else cares. For example, there is a proverb in medieval Europe that says, "My vassal is not my vassal." Translated into vernacular, I am only responsible for those who have my money, and no one else cares.

It means that during the period of slavery in Europe, the emperor distributed the land to the big feudal lords (these people often made great contributions in the war), and they wanted to provide the emperor with troops, and then the smaller feudal lords at the next level, they wanted to provide money to the big feudal lords.

The last class is slaves, who often provide food and pay money to small feudal owners. It's like a golden pagoda, but each level only recognizes its superior. For example, slaves are not emperors, but their customers.

China enfeoffment period

In the feudal system of China and Western Europe, the vassals only served the monarch. My bannerman is not my bannerman, because my bannerman doesn't obey my instructions. I can only order my bannermen, not my bannermen.

If you talk to me about national justice, I'm sorry, I haven't got this concept in my mind yet. The concept of state in Europe only existed during the period of King Louis XIV of France (corresponding to the early Qing Dynasty); As for the concept of nation, it is even later. It is19th century.