When did China start fighting Vietnam and when did it end?

The counterattack in self-defense against Vietnam (internationally called "the Sino-Vietnamese War" and Vietnam called it "the war against China's expansionism") refers to the war between China and Vietnam from February 1979 to March 16.

China People's Liberation Army occupied more than 20 important cities and counties and towns in northern Vietnam in a short time, and claimed victory within one month. Subsequently, the PLA began to systematically destroy the infrastructure in northern Vietnam and then withdrew from Vietnam. The Vietnamese People's Army also declared victory after China retreated. This war has further deteriorated Sino-Vietnamese relations to the lowest point.

Extended data:

The international background of the counterattack against Vietnam in self-defense;

China hopes that Southeast Asian countries will join hands with it to isolate the "polar bear"; In fact, what our neighbors want is to unite Southeast Asian countries to isolate the "dragon".

There are no so-called "overseas Soviets" in Southeast Asia who launched * * * productive rebellion with the support of the Soviet government, but some are "overseas Chinese" encouraged and supported by the governments of China and China, posing a threat to Thailand, Malaysia, the Philippines and, to a lesser extent, Indonesia.

What's more, China publicly claimed that he was related to overseas Chinese, even surpassing the governments of the countries to which "overseas Chinese" belonged, and directly appealed to them to arouse their patriotic consciousness towards China and urged them to return to China for the "four modernizations".

Baidu Encyclopedia-Self-defense counterattack against Vietnam

People's Daily Online-The inside story of Deng Xiaoping's decision on Vietnam's self-defense counterattack.