According to vesicle, going to a war with someone stronger is a sign of toughness;
then my point being that since right now China is challenged by their smaller neighbors does that mean China is weak?
Ignore this if you couldn't agree on, merely an opinion.
I think you misunderstood my point. the premise of my examples was that China acts according to their strategic goals. That was my point in my original post and my later post was simply an elaboration of my original point. Before the 80's, China's goals were to dominate Asia. Then if India and Vietnam challenged China, it was natural for China to act accordingly. China did NOT attack India or went into Korea to show how tough they are. They had a clear strategic plan and did everything to fulfill that plan.
The current plan in China is completely different from what they had in the 50's and 60's. They want to develop their economy and THE thing that they don't want is their neighbors don't like them and don't want to do business with them. Further, ultimately, China also wants allies, just like the US has allies. Attacking whoever they want will not get them any allies. They want to be seen as responsible, not belligerent. And they certainly don't want to seen as a bully. So they don't want to attack the small nations, especially since none of them has done anything that warrant any military action.
The US did everything they could to avoid military confrontation during the Cuban missile crisis when the Soviets moved missiles to the door step of the US. To anyone, that would be considered as a declaration of war. Yet, the US political leadership decided to avoid open war with the Soviets. And now this decision is considered as very wise by almost everyone. China has not met anything remotely close. So why should China attack anyone?
About the question of whether China had things to lose in the 50's and 60's. In my opinion, China had everything to lose. In the 1951, CCP just gained control of most of China and had big plans for China. The CCP leadership was extremely ambitious and planned to develop the economy and the military so that one day in the near future, they would regain their place on top of the world. Losing a war in Korea would mean the end of all this.
First of all, the US would continue pushing into China and eventually occupy the entire China. That means the end of rule for the CCP. Merely 5 years before that, the US just used atomic bombs in Japan. Who would say the US would not use it again in China. In fact, this was exactly what MacArthur was planning to do. Secondly, if the war in Korea drags on for too long and they had to divert too much of their troops to Korea, the Nationalists in Taiwan might come back and attack them. This would also mean the end of CCP in China. This was also planned by Jiang in Taiwan. So these things are not simply possible scenarios, but something that has been seriously contemplated by China's enemies.
In the 60's, China was in the middle of all kinds of political turmoil. To the outsiders, this looked like a disaster. In fact, it was. However, to the political leaders in China at the time, especially Mao, this was merely a step to his ultimate goal of complete control of China and the eventual dominance of China in the world. Attacking India who was backed by the Soviets would risk open war with India and possible with the Soviets. In fact, China and the Soviets were already at war at the time. the two nations already fought a number of battles for isolated islands in the north. Fighting two wars on two sides against India and the Soviets would mean the end of China as we know it. The Nationalists in Taiwan would also attack. In fact, even in 1965, Nationalist Navy planned an attack on the mainland, which was stopped short by the PLA Navy.
In the late 1970's and 80's, China had even more to lose as China just ended the Cultural Revolution and ambitiously started their economic development. A disastrous war with Vietnam and possibly the Soviets would end all this and China would not have its revival. China attacked Vietnam who was also backed by the Soviets. Even before the attack, China was seriously worried abut the Soviets attacking them from the north. They actually moved all their elite forces to the northern border in case of a Soviets attack and only used secondary units in Vietnam. This was not something that was merely in the heads of the Chinese leaders. Even now, the Sino-Russian border is still the most armed in the world with over a million troops from both sides guarding the border.
Even without foreign invasions, Chinese leaders risked everything when they planned a war. In those political turmoils, various factions in CCP fought for political dominance and any weakness shown by a leader would be used by his political enemy to destroy him. In fact, many of the Chinese 1st and 2nd generation political leaders did not meet a good end. A lot of them were persecuted and tortured to death by their political opponents. Imagine what would happen if China actually lost a war. All the leaders who were in favor of the war would have been destroyed.
So in summary, China had a lot to lose when they decided to attack their opponents. In fact, if they lost the war, it would not simply be a loss of face, but loss of control of the entire nation and almost definitely the end of lives of those CCP political leaders. that's a lot more than what a typical political leader in any Western nation would have to face when losing a war. It's a lot more personal, so to speak.