Why do modern Chinese call themselves Han?

I read a lot of Vietnamese historical texts and I notice they did not distinguish themselves with Chinese or think Chinese as another identity. Same for the Chinese they did not distinguish Viet as a separate identity instead they sought to bring or reincorporate Vietnam. Song, Ming explicitly claimed Vietnam as part of China and tried to incorporate and failed

The Chinese Dynasties considered Vietnam as a separate identity were the Yuan and Qing. However the Yuan and Qing were perceived by Chinese nationalists as invaders and not part of Chinese identity.

Meaning, the Vietnamese were the continuous state that practice the same culture uninterrupted for thousands of years meanwhile the Chinese twice had their culture practice interrupted by the invastion of Manchu and Mongol.

Then, does the Han Nhan (people) term come from Han dynasty?The historical context after the Han collapsed none Chinese state referred themselves as Han. They fought under banner Viet/Yue as the Cantonese today still referred themselves as Yue and that included the little state called Nam Han (Southern Han) the king referred themselves as to Yue/Viet. This led to the thought, the Han of the Han period did not refer themselves as Han.

Therefore, the Han people is the modern term that came from the Nguyen who first called themselves as Han Nhan. The historian during the Nguyen Dynasty still regard Nam Viet as Viet state, they must think Nam Han was also Viet state since the Viet was part of it and Nam Han was comprised of the land of Nam Viet. They called themselves the Han people and name the country Dai Nam.

Western source claimed that Gia Long named the country Nam Viet but the Qing court changed it to Viet Nam. However, Ming Mang named the country Dai Nam that also means Ming Mang did not give a single thought Vietnamese was Viet/Yue people, the Vietnamese under Ming Mang referred themselves as Han to differentiate themselves with Chinese Qing. This also means the Chinese under Qing did not refer themselves as Han only the Viet did. Now the Chinese refer themselves as Han while the Viet changed to call themselves Viet/Kinh. It is clearly the Vietnamese tried to separate their identity here.

Both Kinh and Viet are modern terms to describe the Vietnamese and who chose these terms? No where in the Vietnamese historical the ancient people referred themselves as Kinh nor Viet (except for the short period of Nan Yue) but why the early independent Viet dynasties Ngo, Dinh, Le, Ly none of them regard themselves as Viet though historian of that time still think Nan Yue was Viet kingdom, and saw the Chinese as the same people as them and not a separate identity. Clearly, the ancient Viet did not consider themselves as Viet/Yue and Viet is the modern term.
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Concluded, the Vietnamese culture does not borrow from China as many western source claimed. It has been a continuous uninterrupted culture for thousands of years. Chinese culture is a mixed bag of cultures here.

http://vietrealm.com/index.php?topic=37034.0

Huaxia refers to a confederation of tribes—living along the Yellow River—who were the ancestors of what later became the Han ethnic group in China. ... Initially, Huaxia defined mainly a civilized society that was distinct and stood in contrast to what was perceived as the barbaric peoples around them. The forefathers of the Han people living in the Central Plains referred to themselves by this term. Earlier on they called themselves Hua (华), Zhuhua (诸华), Xia (夏) or Zhuxia (诸夏). The term Huaxia (华夏) embodies the common identity of the way of life, language, and culture of the people living in the Central Plains, mainly the Han people, and the inheritance of such identity. The Huaxia people evolved into a fairly stable ethnic group in the Qin Dynasty, which established a unified country of many ethnic groups with Huaxia being the principal group. In the Han Dynasty, the term Han became an alternative name of Huaxia. Later, the term Huaxia was extended to refer to China or the Han people.

The Shang society started the first recorded civilization there around 1760 BC.

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The very earliest period in traditional Chinese history is called the Mythical Period, when—according to legend—the Xia dynasty ruled China. The Shang dynasty, the first historically confirmed dynasty, supposedly began when the Shang overthrew the Xia sometime around 1760 BCE.

The river actually looks yellow due to sedimentation.

South of the Yangtze river was the traditional home of Baiyue tribes, so southern Han were technically Yue people. Even today, it's hard to tell a southern Chinese from a northern Vietnamese.

[img width=400] [/img]

[img width=400] [/img]

Northern China is a totally different geographical area. It's the land of the Manchus, Mongols, Xianbei, and Jurchens, and together they ruled over China for much of its history.

[img width=400] [/img]

Yellow river Chinese are considered southerners with very different lifestyles and customs.

Jews of Asia, merchants, expert sea mariners, etc.

The upturned eaves on roof corners depict boats riding on sea waves.

[img width=400] https://qph.fs.quoracdn.net/main-qimg-f526db30a5c52a83a0655aecc51c1dfb-c [/img]

[img width=400] [/img]

[img width=400] [/img]

[img width=400] [/img]

[img width=400] [/img]

The Tang empire was of Xianbei origin.

South of the Yangtze river was the traditional home of Baiyue tribes, so southern Han were technically Yue people. Even today, it's hard to tell a southern Chinese from a northern Vietnamese.

[img width=400] [/img]

[img width=400] [/img]

Northern China is a totally different geographical area. It's the land of the Manchus, Mongols, Xianbei, and Jurchens, and together they ruled over China for much of its history.

[img width=400] [/img]

Yellow river Chinese are considered southerners with very different lifestyles and customs.

Jews of Asia, merchants, expert sea mariners, etc.

The upturned eaves on roof corners depict boats riding on sea waves.

[img width=400] https://qph.fs.quoracdn.net/main-qimg-f526db30a5c52a83a0655aecc51c1dfb-c [/img]

[img width=400] [/img]

[img width=400] [/img]

[img width=400] [/img]

[img width=400] [/img]

The Tang empire was of Xianbei origin.