Why didn't the ancient unified dynasty emphasize surnames?

There were not so many surnames in ancient times, but there were eight surnames in ancient times. Later, many surnames were taken in the name of fiefs. The Zhou royal family enfeoffed the princes. Many people used to be surnamed Ji, but after the seal, they took the fief as their surname, and their surnames gradually became unclear, so there were more and more surnames. Although people with the same surname have a long relationship, they must be more related by blood than people with different surnames. Especially in ancient times, there were villages and towns with the same surname. People with the same surname may be related by blood, especially in ancient times. Although people with the same surname are rarely related to the royal family, there are naturally many people. At the end of the Western Han Dynasty, Wang Mang usurped the Han Dynasty. At that time, many of Liu's clansmen had a very low status, almost as few as ordinary people, and they were everywhere. Even at the beginning of the war, and Liu Bei used "Han" as their country name to show their identity, in order to defend themselves. Either the same surname does not appear or the dynasty with the same surname is rebuilt, so the probability that all unified dynasties share the same surname is very small.

The forces of the old dynasty were suppressed.

After the establishment of the new dynasty, the people of the old dynasty were naturally suppressed and could not get important positions. The forces of the old dynasty have been suppressed, and there is no hope of rising again.

This is possible in probability.

Just purely in terms of probability, anything can happen, and different surnames are one of the probability situations. There are many surnames, and the probability that they are all different is not very small.

The fate of ancient dynasties

This is not feudalism, but the establishment of ancient dynasties is full of luck, and it seems doomed who will win the world. A dynasty ran out of luck, and basically no one with the same surname could win the world again. ?