From the Eastern Han Dynasty to the Three Kingdoms for hundreds of years, most of the names of people are single characters. There is a special reason for this.
Looking for information, everything is related to Wang Mang. Historically, Wang Mang was a short-lived emperor who usurped political power. It was he who divided the history of the Han Dynasty into the Western Han Dynasty and the Eastern Han Dynasty. After Wang Mang became emperor, in order to consolidate his rule, he took a series of measures, implemented the so-called New Deal, and carried out restoration, from land policy, employment policy to monetary policy, even the names of places and people were involved.
Especially regarding personal names, Wang Mang made a separate rule: double-character names are not allowed. This can be seen from historical records. Wang Mang's eldest grandson is called Wang Zong, and he wants to succeed as emperor as soon as possible. The records illustrate three points: First, there were no restrictions on personal names before Wang Mang, and Wang Mang’s grandson had a two-character name. Second, after Wang Mang came to power, he issued a decree to "remove two names", which stipulated that names with two characters were not allowed. Third, after a person commits a crime, the two-character name is restored as a punishment.
It is precisely because of the law that since then, people have developed the habit of using single-character names when naming. Although Wang Mang's power was short-lived, Wang Zong secretly prepared to seize power. However, before the uprising, the matter was exposed in advance, and Wang Zong committed suicide out of fear of guilt. Wang Mang issued an imperial edict: "The original name of the clan was Huizong. The two names were removed after making, and now it is renamed Huizong." "Making" refers to the decree. This means that Wang Zong's real name was Wang Huizong, and later it was renamed to the single-character Zong in accordance with the laws at the time. Now that it is against the law, it has to be changed back, and it is still called the double-character "Huizong". This period ended early, but this habit has been retained and has not changed. Even during a period of history, people thought it was dishonorable to use two characters for a name, so among the dignitaries and upper-class celebrities at that time, There is no such thing as a double-character name. This habit continued to influence the late Three Kingdoms and even the early Jin Dynasty