Why aren't there more people (Baiyue) now?

The Yue nationality was only the collective name of the people of all ethnic groups living in the south of the Central Plains at that time, and it was not unified in itself, so it was called Baiyue at that time, showing various manifestations. For example, at present, Yangyue is in Jiangxi Province, Nanyue is in Lingnan, Guangdong and Guangxi regions and northern Vietnam, and Dongyue is in central and southern Fujian and Zhejiang.

During the Spring and Autumn Period, the State of Yue established by the Yue people once went north to dominate the Central Plains. However, during the Warring States Period, Chu Weiwang destroyed the State of Yue, and the Yue people split into many ministries. Those descendants of the former King Yue were masters of the country and fought for the position of King Yue. Because of the numerous departments, it is called Baiyue. During the Qin Dynasty, the Qin people controlled Baiyue area, which belonged to Huiji County, Nanhai County, Rinan County and Xiang Jun County respectively. At the end of the Qin dynasty, there was chaos in the world. The descendants of Gou Jian, Min Junyao and Wu Zhu, took part in the Qin War. Later, he participated in the battle of the Han army to annihilate Xiang Yu. Liu Bangli made Wu the king of Dongyue and Min Junyao the king of the East China Sea. In addition, when Ren Tao, the former commander-in-chief of Lingnan in Qin Jun, was seriously ill, he called Zhao Tuo, commander of the South China Sea, made him his successor, and ordered him to cut Lingnan to stand on his own feet. After the death of Ren Tao, Zhao Tuo succeeded to the throne. He sent men to kill officials of the Qin Dynasty in Yenan and Xiang Jun, and sent troops to block all the passes in Wuling and establish himself as the emperor of South Vietnam. After the establishment of the Han Dynasty, he accepted Lu Jia's suggestion, took the title of emperor and surrendered to the Han Dynasty.

During the period of Emperor Wu of the Han Dynasty, civil strife occurred in South Vietnam, and the country's prime minister Lu Jia rebelled and killed the pro-Han king of South Vietnam. The Han army went to suppress the rebellion and the country of South Vietnam perished. The Han Dynasty established county rule in the hometown of South Vietnam. The two Vietnamese regions have been fighting with each other since the early Han Dynasty. Later, the East China Sea was weak and was often invaded by East Vietnam. However, the chief executive of Huiji County is often at a loss about the long-term struggle between Guangdong and Vietnam. Finally, the East China Sea Kingdom couldn't stand it, so the East China Sea King wrote to the court and asked to seal it up. With the consent of the imperial court, all the people of the East China Sea Kingdom moved northward to the Jianghuai area, and the East China Sea Kingdom naturally disappeared. Dongyue became more and more rebellious and finally rebelled after losing the rival East China Sea. Emperor Wu of the Han Dynasty sent troops to destroy Dongyue and successfully settled in Huiji County. Since then, the March area has been entirely managed by counties under the central government.

However, there were still many Vietnamese at that time. During the Three Kingdoms period at the end of Han Dynasty, Sun Wu's regime continued to conquer the Vietnamese people in its territory. At that time, the Yue people in the plain area had basically integrated into the Han nationality and became a part of the Han nationality. Sun Wu conquered Shanyue. Every time the Sun Wu regime occupied a piece of land in Shanyue, it had to count their population and implement the same management methods as the Han people in the plain. In this way, the original social structure model of Vietnamese was disrupted, and they gradually integrated into the Han nationality. In the Tang Dynasty, there were only a few Shanyue people left in Fujian, and finally they were integrated into the Han nationality. Before that, the South Vietnamese in Guangdong had already integrated into the Han nationality.

Although most Vietnamese are integrated into the Han nationality, there are still many ethnic groups that are descendants of the Vietnamese. Such as Yao, Jing (Vietnamese), Zhuang, She and Dong are all descendants of the ancient Vietnamese. For example, the Zhuang nationality was called Luo Yue in the Han Dynasty. At present, among the nationalities outside China, Vietnamese are the largest descendants of Vietnamese. Northern Vietnam has been under the direct jurisdiction of China for a long time, belonging to Jiaozhi County (now Hanoi, Vietnam), so the degree of sinicization is still quite high.