During the Three Kingdoms period at the end of the Han Dynasty, most people's names were single characters, such as Liu Bei, Zhang Fei, Zhao Yun, Guan Yu, Ma Chao, Huang Zhong, and so on. On this basis, the case of duplicate names, that is, the same name and surname, is naturally difficult to avoid. For example, there were three historical figures named "Li Feng" at that time. Among them, the first Li Feng was a general of Yuan Shu, who was killed by Cao Cao at the end of the Eastern Han Dynasty; the second Li Feng was a minister of the State of Wei, and after the Gaopingling Rebellion, Li Feng participated in the plot to depose Sima Shi, and because the matter was exposed, he was eliminated by Sima Shi; the third Li Feng was the son of Li Yan, the minister of Shu Han, that is, he served Shu Han.

At the same time, as far as the author wants to talk about "Zhang Yun" today, there is also a case of duplicate names. During the Three Kingdoms period at the end of the Han Dynasty, there were two important historical figures named "Zhang Yun", one was a subordinate of Liu Biao, the mu of Jingzhou, and the other was a Wenchen of Eastern Wu. Below, let's talk about these two historical figures named Zhang Yun.
I. Zhang Yun (under Liu Biao)
On the one hand, according to the "Book of the Later Han Dynasty, Liu Biao" and other historical records, Zhang Yun, a general of The Jingzhou Mu Liu Biao at the end of the Eastern Han Dynasty. For Zhang Yun, because he was the nephew of Liu Biao's wife Cai Shi, this prompted him to gain Liu Biao's reuse and trust. Of course, from another point of view, at the end of the Eastern Han Dynasty, Liu Biao was able to take charge of Jingzhou, and Cai Mao's younger brother Cai Mao and nephew Zhang Yun naturally played an important role. After all, Liu Biao was not a scholar of Jingzhou, which prompted him to rely on Cai Mao, Zhang Yun, and others.
At the same time, among Liu Biao's two sons, Zhang Yun, Cai Mao, and others supported the second son Liu Qi, rather than the eldest son Liu Qi. In 208 AD, Mu Liu Biao of Jingzhou became seriously ill. On this basis, Liu Qi, the eldest son of Liu Biao, prepared to visit his father. However, Zhang Yun and others feared that after Liu Qi saw Liu Biao, the latter would change his mind and pass on the position of Jingzhou Mu to Liu Qi. Therefore, Zhang Yun prevented Liu Qi and Liu Biao from meeting.
Soon after, Liu Biao died, and Cai Mao and Zhang Yun assisted Liu Biao's second son Liu Qi to take the throne. At the same time, Cao Cao's army had already begun to attack Jingzhou. In the face of Cao Cao's army, Liu Chun, the mu of Jingzhou, chose to surrender. Therefore, Zhang Yun and others naturally followed Cao Cao. It is worth noting that in Luo Guanzhong's Romance of the Three Kingdoms, because of Zhou Yu's counter-plan, Cao Cao beheaded Cai Mao and Zhang Yun. However, in Chen Shou's Chronicle of the Three Kingdoms, there is no record of Cao Cao killing Cai Mao and Zhang Yun. In other words, Zhang Yun's final ending is not a clear statement. In this regard, in the author's opinion, considering that Liu Chun, the mu of Jingzhou, was treated well by Cao Cao, therefore, for Zhang Yun and others, they should have obtained a good ending.
2. Zhang Yun (Eastern Wu Wenchen)
On the other hand, for Eastern Wu, there was also a historical figure named Zhang Yun. According to historical records such as the Chronicle of the Three Kingdoms, Zhang Yun, born and died unknown, was a native of Wu County, Wu County (around present-day Suzhou, Jiangsu Province). In the last years of the Eastern Han Dynasty, Zhang Yun became famous in Wu County because he despised money and attached importance to quality. And this naturally attracted the attention of Sun Quan. As a result, Sun Quan made Zhang Yun the Title of Eastern Cao.
The Book of Later Han records that Dong Cao Was an official of a courtier. During the Western Han Dynasty, the Xiangfu and the Eastern Han Dynasty were both placed. During the Han Dynasty, the Office of the Minister of Commerce and the General's Mansion were divided into Cao, including Eastern Cao and Western Cao, and the officials of each Cao were called Cao Tuan. Taiwei Province East and West Cao Tu rank is 400 stones, Western Cao Palm Fu History Office uses, East Cao Palm 2,000 stone long officials removed and military officials.
However, for Zhang Yun, because of the relatively early time of his death, he failed to achieve greater achievements under Sun Quan. In addition, For Zhang Yun's son Zhang Wen, he became the chancellor of Eastern Wu. Zhang Wen (193–230), courtesy name Huishu, was a native of Wu County, Wu County (around present-day Suzhou, Jiangsu Province), and an official of the State of Wu during the Three Kingdoms period. Less disciplined, strange appearance. Sun Quan summoned Yi Lang and Cao Shangshu to be the Crown Prince. He was born in the Zhang clan of Wu County, one of the four major surnames in Jiangnan.