In ancient times, emperors often chose to accompany their capitals. What was the point of choosing a companion capital?

"Deputy Administrative Center" is not an unfamiliar term in our country. As early as the Xia Dynasty, it is said that there were three "deputy administrative centers" called accompanying capitals - Anyi (today's Xia County, Shanxi), Pingyang (today's Linfen, Shanxi), and Jinyang (today's Taiyuan, Shanxi); during the Shang Dynasty In the late period, Chaoge became the "deputy administrative center". Although it was not named as a companion capital, most of the Yin Zhou kings worked and lived here; before the destruction of the Yin and Shang Dynasties in the Western Zhou Dynasty, Fengyi and Haoyi (both near Xi'an) were separated by the Feng River. ) was designated as the capital, with the older Fengyi as the "deputy administrative center". After the destruction of the Yin and Shang Dynasties, a "Deputy Administrative Center" was established in Luoyi (now Luoyang, Henan) in the Central Plains.

The Han Dynasty was a dynasty with the surname Liu. It was divided into the Early Han Dynasty founded by Liu Bang and the Later Han Dynasty founded by Liu Xiu. Later historians used to refer to the Early Han Dynasty as the "Western Han Dynasty" and the Later Han Dynasty as the "Eastern Han Dynasty".

In 206 BC, Liu Bang was named "King of Hanzhong". In the "Chu-Han Struggle", Liu Bang defeated Xiang Yu and established the world in 202 BC. On February 28 of that year, Liu Bang held an enthronement ceremony in Sishuiyang, Dingtao, Shandong, and named the country "Han". The first capital was Luoyang, and the ministers supported it and believed that "it is solid enough to rely on." But soon, Liu Bang changed his mind and made Luoyang his companion capital and Chang'an the capital.

The Han Dynasty was a dynasty with the surname Liu. It was divided into the Early Han Dynasty founded by Liu Bang and the Later Han Dynasty founded by Liu Xiu. Later historians used to call the Former Han Dynasty the "Western Han Dynasty" and the Later Han Dynasty the "Eastern Han Dynasty". This is due to the different locations of their respective capitals. In 206 BC, Liu Bang was named "King of Hanzhong". In the "Chu-Han Struggle", Liu Bang defeated Xiang Yu and established the world in 202 BC. On February 28 of that year, Liu Bang held an enthronement ceremony in Sishuiyang, Dingtao, Shandong, and designated the country as "Han".

The first capital was Luoyang, and the ministers supported it and believed that "it is solid enough to rely on." But soon, Liu Bang changed his mind and made Luoyang his companion capital and Chang'an the capital. It turned out that the analysis of counselor Zhang Liang played a decisive role. "Hanshu Zhang Liang's Biography" records that Zhang Liang believed that Luoyang was "a small country, only a few hundred miles away, with thin fields and enemies on all sides, so it is not a country that uses force"; Chang'an was a "golden city thousands of miles away, a country of abundance".

In the first year of Jianwu (AD 25), Luoyang finally ushered in a turning point and was transformed from a "famous companion capital" to a "famous capital" of the Eastern Han Dynasty. In October of this year, Liu Xiu broke with Wang Mang's reform regime and ascended the throne as emperor in Hebei Province (now Gaoyi, Hebei Province). In order to show that his Liu surname was orthodox and that the Han family was revived, he still used "Han" as the country's name. This is Eastern Han Dynasty. After Liu Xiu determined Luoyang as the capital (Eastern Capital), he set Chang'an as the accompanying capital, which was called the "Western Capital".