To put it simply, these three areas were once the territory of China, and Vietnam (from 65438 BC+065438 BC+065438 BC+0 BC, Vietnam was under the jurisdiction of the feudal dynasty in China until the Song Dynasty in China) was a county in China. At that time, Vietnam was called "toe-to-toe" and "Annan", which was the county era in Vietnamese history. Wuchi Road in Yunnan was established in the Qin Dynasty, and officials were sent to Yunnan, marking the beginning of the official rule of Yunnan by the central dynasty. Yizhou County was established in the Western Han Dynasty and Yongchang County was established in Baoshan in the Eastern Han Dynasty, which further deepened the rule of Yunnan, and the territory of China in western Yunnan has been basically laid. Korea {China's earliest recorded Korea was after the destruction of the Shang Dynasty in the Western Zhou Dynasty, and Ji Zi, a follower of the Shang Dynasty, went to the Korean Peninsula and established a "post-Ji country" with the local aborigines. At the end of 3rd century BC, it was recorded for the first time in Korean history. According to Records of the Historian written by Sima Qian, a historian of Han Dynasty in China, Ji Zi, uncle of Zhou Wang, the last monarch of Shang Dynasty, led more than 5,000 people to leave the country because of his disagreement with Zhou Wang's political views, and later came to present-day Korea. After the King Wu succeeded in cutting Zhou, it became a vassal state, which was called "Ji's Korea" in history.

According to the Korean history book "The Legacy of the Three Kingdoms", after Ji Zi came to North Korea, the descendants of Dangen moved south with their clansmen in order to avoid conflicts with people brought by Ji Zi. These people later became the ancestors of Sanhan.

Jizi Korea ruled the Korean peninsula for nearly a thousand years. According to Taiyuan Xianyu genealogy, the Xianyu family in North Korea originated from the descendants of Jizi Korea. Starting from Ji Zi, they experienced 4 1 generation monarchs, and were not eliminated until 1 century BC.

For some reasons, some North Korean and South Korean scholars have some disputes about the existence of this history and do not recognize the existence of Jizi Korea.

Wexler.

Wei Man, a native of Yan State, led immigrants to North Korea, established the Wei regime in Pyongyang in 194 BC, and overthrew the North Korean regime. This is the second dynasty in Korean history, called "Wei's Korea".

Four Han and three Han

In BC 108, Emperor Wu of the Han Dynasty annexed Weishi Korea and established four counties, namely Le Lang, Xuantu, Lintun and Fan Zhen, in the north-central part of the Korean Peninsula, which were called "Han Four Counties" in history.

The ancient Koreans who moved south, including the adherents of Wei Korea and other tribes, established the kingdom of Chen centered on Chen Han, Zhou and Han in the southern part of the Korean peninsula, and also some small countries such as Kato. After that, they all became independent one after another, but they were all vassal states of China (in 968 AD, Ding Tribe established "Daqu Yueguo" and claimed to "defeat Ming Di". From then on, Vietnam got rid of the rule of China feudal dynasty and became an independent country, but it still maintained a vassal relationship with China) Yunnan (In 707 AD, the Tang Dynasty defeated the Tubo expansionist forces invading Erhai Lake in the south and established an iron column to make contributions. In 738 AD, Nanzhao unified Erhai Lake area and awarded the title of "King of Yunnan", which further developed the general trend of unity and unity between Yunnan and the motherland. During Nanzhao period, Guizhou was in the east, Irrawaddy River in the west, Xishuangbanna in the south and Dadu River in the north. The southeast border is now Vietnam, and the southwest border is now Myanmar; There are Tubo in the northwest and Rongzhou (now Yibin) in the northeast. Nanzhao's internal repair system, the construction of Dongcheng (now Kunming), the construction of the three pagodas of Chongsheng Temple, the development of economy, and the active study of advanced Han culture in culture have strengthened the economic and cultural ties between various regions and ethnic groups in Yunnan. In 897 AD, Zheng Maisi killed Wang Jian, the "great river" in Nanzhao. In 927, Yang Ganzhen established "Da Yi Ning". In 937, Duan Siping contacted 37 ministries to pacify the country and establish the "Dali Kingdom" regime. Dali regime basically inherited the border since Nanzhao, with eight states, four counties and thirty-seven departments, and practiced feudal serfdom. The rule of Dali regime in Yunnan is basically the same as that of Song Dynasty in the Central Plains. The king of Dali paid tribute to the Song Dynasty, and his leaders were successively named "King of Eight Counties in Yunnan" and "King of Dali" by the Song Dynasty, and became the assistant to resist the western line of Mongolian nobles in the Southern Song Dynasty. The Dali regime has always maintained a vassal relationship with the Song Dynasty. North Korea (at the end of the Han dynasty, due to the disintegration of the Han dynasty, it was impossible to look to the north. In the 4th century A.D., North Korea formed a period in which Gaoyou, Silla and Baekje were the three pillars.

Around A.D. (recorded in the Chronicle of the Three Kingdoms in 1 century BC), there were three major regimes on the Korean peninsula: Silla (57-935 BC), Koguryo (37-668 BC) and Baekje (0/8-660 BC). At the southern tip of the peninsula, there are other regimes such as Gad. Countries attacked each other, and at the same time there was a heyday in Korean history.

Baekje was developed by Mahan tribe, and Silla was formed by a small tribe in Chen Han.

Unified Silla era

In these three countries, Silla has always reconciled with the Central Plains. Silla and the Tang Dynasty jointly destroyed Baekje in 660, Koguryo in 668, expelled Tang Jun in 676, and finally unified Korea, making Gyeongju its capital, adopting the state system of the Tang Dynasty.

In the 9th century, farmers all over the country revolted. In 900, Zhen Xuan, the general of the army, became king. After the establishment of Baekje, Gwangju was its capital. In 903, Gong Jin, an uprising monk, proclaimed himself king, and established Taifeng State (initially known as Mozhen State) in the north and northwest of Silla, with Tieyuan as its capital. In 9 18, Wang Jian established the Korean dynasty, and later took "Korea" as the country name. The original Silla is also known as the post-Three Kingdoms period.

Silla died in Korea in 935, and the Silla era ended. This era is called the North-South era by some Korean scholars. The attitudes of the three regions towards the Central Plains Dynasty are very similar, that is, the Central Plains Dynasty was strong and obedient. Once the national strength of the Central Plains dynasty declined, it took the opportunity to hit people when they were down and became a cancer of trouble. For example, North Korea in the Sui and Tang Dynasties, Nanzhao in the Tang Dynasty repeated between Tubo and Datang, and Vietnam after Yongle in the Ming Dynasty. Finally, Yunnan became a part of China after the Mongolian period.

In A.D. 1253, Kublai Khan led an army to cross Jinsha River into Yunnan and destroy Dali Kingdom. 1260, "General Manager of Dali Kingdom" was established. 1274, Kublai Khan sent a talented Hui people to Saidianchi Lake to Yunnan, established Yunnan Province, and appointed Saidianchi Lake as "the government of Yunnan Province" (equivalent to today's governor) to govern Zhongqing (now Kunming). Yunnan Province has its own roads, prefectures, prefectures and counties, which are directly managed by officials appointed by the provincial government. The establishment of Yunnan Province brought Yunnan into the unified governance of the Yuan Dynasty and opened a new situation in Yunnan history. Since then, the name "Yunnan" has officially appeared in history as a provincial institution. North Korea was destroyed by Mongolia and rebuilt (the Ming Dynasty overthrew the Mongols in 1368, and Zhu Yuanzhang wanted to recover the Mongolian territory in the northeast of China in 1387. King Koryo still clings to the remnants of Mongolia and refuses to return them. He sent Li Chenggui to attack Liaodong, while Li Chenggui opposed sending troops and staged a coup. 1392 deposed the king and changed his name to Korea. This era was called "Li Dynasty" by Japan, and this title is still used in most historians. Scholars in North Korea and South Korea think it should be called the Korean era. Vietnam was not destroyed and became an independent country after the founding of the People's Republic of China. This is all I have. Please forgive me if I don't know the details.