Ancient China has a long history of thousands of years, Chinese culture is in these thousands of years, after a succession of dynasties, bred and cultivated, Chinese civilization not only nourishes the Yangtze River Yellow River Basin, for the entire East Asian cultural circle, have a very great impact, of which there are two countries, the past and the Central Plains have a very close relationship, their national names are the Chinese emperor reward, and spread for hundreds of years to this day, which two countries? They are North Korea and Vietnam.
The relationship between China and Korea has a long history as early as the beginning of the Han Dynasty, and the two countries have also had many wars, and during the sui dynasty and Tang Gaozong Tang Taizong, they repeatedly carried out military conquests of Goguryeo, which was then located on the Korean Peninsula, forcing it to pay tribute to the Central Plains, and in most cases, the princes of the Korean region existed as the Pan vassal states of the Central Plains Dynasty.
In 1392, Li Chenggui overthrew the Goryeo Dynasty and established himself as king, deeply understanding the past history of Korea, Li Chenggui knew in his heart that the Central Plains Dynasty would be an important part of influencing his own power and throne, so in exchange for the recognition of his throne by the Ming Dynasty at that time, he sent envoys to Zhu Yuanzhang.
In order to show respect, he decided to let Zhu Yuanzhang decide the name of his country, which made Zhu Yuanzhang's face very bright, so he took the ancient text "Asahi Distinct", set the name of the country as Korea, which is used to this day, and the Ming Dynasty and Korea also maintained a very good relationship, during the Wanli Emperor, Japan has repeatedly tried to invade the Korean Peninsula from the sea, the Ming Dynasty has sent a large army to help Korea repel, the Joseon Dynasty is also very grateful to the Ming, so that after the fall of the Ming, there is still a period of time to use the name of the Ming Emperor.
Another country, Vietnam, and the Central Plains Dynasty experience may not be so pleasant, in the Qin Dynasty, located in Guangdong Guangxi and Southeast Asian peninsulas and other regions are called South Vietnam, in 214 AD, Qin Shi Huang in the sweep of the Six Kingdoms, but also let the Qin general Zhao Tuo lead 500,000 troops south to conquer the many indigenous tribes in the local area. And here set up Nanhai County for jurisdiction, which is also the first contact between the Central Plains Dynasty and Vietnam, after that, the Central Plains because of war and other relations, and South Vietnam and other places have been intermittent and timely, sometimes the Vietnamese will be independent from the Central Plains, and sometimes they will be subservient.
In 1802, the Nguyen family established the Nguyen Dynasty in Vietnam, King Nguyen Phuc Anh saw the qing army was powerful, requested to change the name of the country to South Vietnam, as mentioned before, South Vietnam also included parts of Guangxi Guangdong in the past, Jiaqing also saw the intention of Nguyen Phuc Anh's plot, very angry, and then gave the people "Vietnam", and crowned him as the king of Vietnam, Nguyen Phuc Anh stole chickens and did not become a corrupt rice, he originally wanted to rely on the name of the country to take advantage of a little land, but was seen through, and could only accept the title of Jia Khanh, The name of the country has been preserved to this day.