Divided into the Western Han Dynasty and the Eastern Han Dynasty. Liu Bang, Emperor Wu of the Han Dynasty, established the Western Han Dynasty with Chang 'an as its capital, also known as the former Han Dynasty. Liu Xiu, Emperor Guangwu of Han Dynasty, established the Eastern Han Dynasty with Luoyang as its capital, which is the later Han Dynasty. The Western Han Dynasty and the Eastern Han Dynasty are collectively referred to as the Han Dynasty. 2008 is an important year in the history of China. It was during this period that the Han people changed their names. After Qin Shihuang unified China, cultures of various countries infiltrated and merged with each other during the Warring States Period. By the Western Han Dynasty, China had gradually unified laws and regulations, language, culture and education, customs and habits, and formed a common Chinese culture. Both the Han nationality and the surrounding ethnic minorities were members of the multi-ethnic countries in China in the Han Dynasty. Because of its high level of civilization, the Han nationality has always been in a dominant position among all the fraternal nationalities in China. This is the result of historical development and natural formation. Since the Han Dynasty, although the name of the dynasty has changed, the status of the Han nationality as the main ethnic group in China has not changed.

The Eastern Han Dynasty was a unified dynasty in the history of China. In order to distinguish it from the Han Dynasty before the Western Han Dynasty, it is also called the later Han Dynasty. Luoyang, the capital of the Eastern Han Dynasty, is called Tokyo, so Tokyo is also called the Eastern Han Dynasty. A total of 12 emperors passed 196 years. The Eastern Han Dynasty also made remarkable achievements in culture and military affairs: Cai Lun improved papermaking; Zhang Heng invented the seismograph and the armillary sphere. At the same time, Buddhism was introduced into China during this period. During the Eastern Han Dynasty, powerful landlords and kingdoms expanded to form powerful clans. During this period, Xiongnu and Qiang people began to migrate to the inland, while Xianbei people had a direct impact on the national exchanges and harmony of later generations according to the situation of Mongolian grassland. The Roman Empire, that is, Europe at the same time as the Han Dynasty, was listed as the most advanced civilization and the most powerful empire in the world at that time in A Brief History of the Western Han Dynasty. On the basis of the territory of the Qin dynasty, it further expanded its own territory. In its heyday, its territory reached Wuyuan County and Shuofang County in the north, Nanjun County in the south, Lintun County in the east and Iris Lin County in the west.

During the reign of Emperor Ping of the Western Han Dynasty, the population of the whole country was about 60 million. Accounting for one third of the world at that time.

Cultural unity and advanced science and technology in han dynasty. The establishment of the East Asian cultural circle represented by Confucian culture laid the foundation for the social development of the Chinese nation in 2000 and made great contributions to the continuation and standing of Chinese civilization. During the reign of Han Ming Yongping, eunuch Cai Lun improved papermaking and became one of the four great inventions in China. Zhang Heng invented the seismograph and the armillary sphere.

After the Han Dynasty, China people were gradually called "Han people".

How long has the Han Dynasty existed?

202 BC-9 AD, 25 AD-220 AD)

China was a dynasty after the Qin Dynasty. It is divided into two historical periods: the Western Han Dynasty and the Eastern Han Dynasty. Later historians also called it the Han Dynasty.

Liu Bang was founded in the Western Han Dynasty, with Chang 'an as its capital. Founded by Liu Xiu in the Eastern Han Dynasty, Luoyang is the capital. During this period, there was a brief new dynasty in which Wang Mang usurped power and became independent. In addition, some scholars also listed Shu Han as a continuation and part of the Han Dynasty. As a result, the Han Dynasty perished in 263, but most of the statements include the Shu-Han regime established by Liu Bei in the history of the Three Kingdoms.