Vietnamese, with a mother tongue population of 75 million (in 2007), belongs to the South Asian language family-Vietnamese family-Vietnamese branch and is related to Khmer. It has been marked with Chinese characters in history and incorporated into Chinese vocabulary. 1945 began to use Latin alphabet, and about 1000 Jing people in dongxing city, China used Vietnamese.
Extended data
In the early days, Vietnamese did not invent a writing system suitable for their own language. About the Eastern Han Dynasty, Chinese characters (called "Confucian characters" by Vietnamese) began to be introduced into Vietnam systematically and on a large scale.
After the Chen Dynasty in Vietnam, Chinese characters became the main characters of the Vietnamese government and people. At this time, a large number of works in Chinese characters began to appear, the most famous of which was/kloc-The Great Historian of Vietnam compiled in the 5th century.
It is worth noting that these articles written in Chinese characters are basically not written in accordance with Vietnamese grammar rules, nor do they use Vietnamese vocabulary, but are written purely in accordance with the grammar of ancient Chinese. So these Chinese works are Chinese works, which are very different from the spoken Vietnamese at that time.
Baidu Encyclopedia-Vietnamese