What do you mean by "land of kings" and "land of kings"?

It means: looking at the vast world, there is no place that is not the place of the monarch; Look at the end of the horizon, where there is closed land everywhere. There is no one who is not a servant of the monarch.

Source: Beishan, Xiaoya

Original sentence: Under heaven, is it the land of kings? Is leading the land king? There are different doctors, and I am engaged in unique talents.

Interpretation: Looking at the vast world, there is no place that is not the place of the monarch; Look at the end of the horizon, there are fiefs everywhere, and there is no one who is not a servant of the monarch; Alas, doctors distribute labor unfairly, but let me work so hard for my country!

Extended data:

The society and political power of the Zhou Dynasty were organized according to the strict patriarchal clan system. The officials of princes are divided into Qing, doctor and scholar, with strict hierarchy and insurmountable status, and their status is determined according to the distance of blood relationship. Scholars belong to the lowest class and are in the most servile and oppressive position within the ruling class.

There are many poems in The Book of Songs that describe the hardships and sufferings of this class and express their anguish and dissatisfaction, thus objectively exposing the profound contradiction between the upper and lower relations within the ruling class and reflecting the inequality and hidden dangers in the patriarchal society.