In 1976, Vietnam, which had the Soviet Union as its backer, no longer concealed its hostility towards China and continued to provoke and create conflicts on the Sino-Vietnamese border. In the face of Vietnam's crazy provocations, our country could not bear it anymore and began to discuss counterattacks and punishments against Vietnam. However, due to historical factors, China's national and military strength not only did not develop, but also regressed a lot. Therefore, even Liu Shuai and Su Yu, two veterans with rich military experience, made it clear that they were against sending troops. 
Of course, Liu Shuai and Su Yu opposed sending troops, not because they were afraid of Vietnam, but because they were afraid of the forces behind them, the Soviet Union. At that time, the borders of a million Soviet troops were on the border, and throughout the sixties and seventies, China was on high alert against the Soviet Union. What worries the veterans even more is that the Soviet Union and Vietnam signed the "Soviet-Vietnamese Treaty of Friendship and Mutual Assistance", and if one side is attacked, the other side has the obligation and right to fully intervene with arms. 
At this time, ** pointed out that the Soviet Union, like the United States, also had a "paper tiger" side. The strategic core of the Soviet Union was in Europe, and many of the Soviet troops on the Sino-Soviet border were not fully organized, and if the Soviet Union launched a full-scale war against a big country like China, it would inevitably hurt its own vitality, and Vietnam, a small and insignificant country in the East, might not be worth the Soviet Union's big risk. Of course, this does not mean that we can clean up Vietnam without any scruples, and although the Soviet Union will not participate in a full-scale war, it is very likely that it will take a sharp and powerful attack on some parts of our country, which will also be extremely disadvantageous to our country. In such a situation, we should adopt a rapid military strike with a certain level of restraint, which can not only teach Vietnam a lesson, but also quickly withdraw its troops, so that the Soviet Union will not have time to react. This analysis made everyone nod yes, and the leaders finally made a decision to fight back in self-defense against Vietnam. On February 17, 1979, the counterattack against Vietnam began, and under the joint command of the two fierce generals Xu Shiyou and Yang Dezhi, our army resolved the battle in just over a month!And the Soviet Union, on which Vietnam had high hopes, did not send troops from beginning to end.