Basically, the main battlefields like this are fought in other countries, and they are all used for teaching, such as high school history books. This can be considered that the country and the party don't want you to know. Why? Going to Korea to fight is to fight the United States, but the more Vietnam, the more countries. A country that we used to help against Americans is now biting us. If you know this, you will certainly have a hatred for him, or at least a bad impression.

But because of the existence of the United States, it will always be China's most powerful enemy, and China alone will certainly not be able to confront and bring down the big brother Soviet Union. Therefore, our country now hopes to unite all forces that can be United, and some that cannot be United do not want to be enemies.

Personal point of view.