What did the ancient monarch do? What is the equivalent of the current official position?

Wang Ye's job is to manage his own fiefs and collect land rent from them. As for the official position, it's not as good as it is now. Sovereign is a title representing identity, which can be bigger than the emperor and smaller than the county magistrate. The key is to look at the trust and power of the emperor and what the emperor asks him to do. If the monarch is in charge of military power, the emperor will also look at his face.

Extended data:

Your majesty:

"Wang Ye" is a title in the hierarchical system of ancient feudal society, with a high status. Generally, it is the son or relative of the emperor, and there are also a few people who have made great contributions. Tracing back to history, the "princes" began to appear in the Qin Dynasty, and then existed in various dynasties. The treatment and life enjoyed by princes in various dynasties were also different.

During the Wei, Jin, Southern and Northern Dynasties, princes were divided into "princes" and "county kings", and later there were "princes". The rank of the prince is higher than that of the county king, while the captaincy has its own fief and army, which is responsible for managing all the affairs of the fief. It can be said that the captaincy had real power, and there were constant wars at that time. Most of them were captaincy and were also responsible for leading troops to fight.

Monarchs are prone to accidents when they have power, so in the late Sui and Tang Dynasties, various real powers of monarchs began to weaken. Moreover, most of the vassals who were knighted stayed in Beijing, and there were not many enfeoffments. Since the Tang Dynasty, basically all the sons of princes have been crowned county kings, which has taken the form of heredity.

In the Song Dynasty, the governors had no rights at all, only a distinguished position remained. The princes of the Song Dynasty were the most romantic. Without the responsibility and risk brought by power, they still kept their position and well-off life. Therefore, the prince of the Song Dynasty can wake up naturally every day, order people to eat whatever they want, keep some flowers, birds, fish and insects at leisure, or go out for a trip. It is really a happy life.

Baidu Encyclopedia-Wang Ye (the title of feudal times in China)