No country would like a prolonged war. But certainly the countries like China, Russia have the ability to fight a prolonged war than most of countries in the world, for example Sino-Japan war (8 years), Korea war (2 years).
In the case of 1962 and vietnam, the targets of both wars only requires hit & run tactics. But for your information, there was another war or skirmish with Vietnam, which lasted for 10 years on the border--both side shooting each other every day! Of course the goal of this war was compeletly different!
Exactly this is what proves my POV, China has learned lessons from Japanese, Korean & Vietnam War, and that is why it is very sensitive and knows very well that situation will spin out its control to anything that will drag a conflict that longer, As far as India is concerned, China do not have a capability to inflict a full scale defeat to Indian Army so the chance remains with India to counter attack and bleed China. India will ensure a war of attrition and that the cost of war on China will be very heavy v/s what China gains from such conflict"¦
In 1962 war with China from India's perspective was a GOD sent opportunity to indentify the areas where India is lagging [infrastructure, material and training] and most important realization of Nehru's worthless idealistic philosophies and realization of China as a backstabber and never to be trusted.
Post 1962, India did come out very well in 1965 when Pakistan with China's backing wanted to do a repeat of 1962 and failed miserably losing land in that war"¦ In 1971 almost 9 years after 1962 China found it incapable to save its close friend Pakistan from disintegration. In 1975 Sikkim joins Indian Union inspite of a boarder scuffle with India on the same"¦ the year 1987 proved that India too can if it wants to in case the situation arise by crossing the LAC into TIBET.
This is one of reasons, but not a major one.
The major ones are:
1. Chinese army already run out of their supplies.
The above is simply an unadulterated lies, China took advantage of the situation prevailing out of Cuban crisis as both the super power were embroiled with the said situation, Once China saw USA tilting and saw the US started sending arms to India wanted to an excuse to pull out as quickly as possible as it was definite that India will regroup and counter attack China in Arunachal Pradesh.
2. Chinese already got what they were coming for: pushing indian army out of Aksai Chin.
As Aksai Chin is considered as far I know India was not in the possession or control of that land mass prior to 1962 except few patrols to that area.
Still you are crying for the 90,000 sq kms south of TIBET, By Chinese running away from Arunachal Pradesh / SOUTH TIBET it has re enforced India's control on the same area which its was left unguarded in early 1960's"¦.
In korea war, the ratio was 2.9m chinese vs 1.2m UN forces.
So you have seen what happens if you do not have a numerical superiority of at least 5:1 in your favor, China + Korea attacked US + SK down the 38 parallel and driven back up north"¦ Better to call the Korean war a stalemate"¦ If USA wanted and nuked you, you would have been in to your knees and begging, so there is nothing to show off then, plain and simple China pushed UN troops down south, then retaliation they shoved you up north till the 38th parallel was accepted by you as ceasefire line"¦
In vietnam, Chinese did have numberical superiority but Vietnam was the one enjoying material superiority. Vietnam army was equiped with 2 superpowers' 70s weapon while Chineses were still using the weapons designed in 1960s.
It is better you do not whine when it comes to Vietnam, a small country humbled you badly"¦ they have showed to the world that China are not capable to hold on to the territories and fear full of any counter attacks"¦
India isn't much better than Chinese on this. If india experienced army can't completely defeat Chinese in first half year, both side will be on the same level. For the country like China, you can't win a war in half years, even USA can't on the land.
Indian Army has in recent years have more fighting experience as recent as late 80's in Sri Lanka and late 90's against Pakistan, not to forget 50 years of jungle / mountain fighting against terrorists. India learned where we lack and making continuous improvement.
Compared to India's that China Airforce & Navy has no fighting experience"¦
Good, that is exactly what China wants you to do. Overspending your money on a war which will not happen unless you own start it.
No indian member in this forum has noticed that India is enjoying the numberic and material superior NOW.
Just the opposite!!! China is not comfortable to infrastructure buildup on the Indian side, this is showing up in Chinese unease in the Chummar sector and recent suggestion in the border talks to TIE the infrastructure development along Indian side is very well known.
India do not need to start a war, India will continue to build the infrastructure in our side, and with each passing year your advantage to holding higher ground will wane"¦
You will definitely see more and more aggressive Indian patrolling and an occasional IA losing their way into TIBET side , so you see the 1962 situation is again un folding in next few years, at least as I see it"¦ The million Dollar question now can China REPEAT ONCE MORE?? What will happen to China if India gives a bloody nose this time??? Food for thought"¦.
...... and if theyre full time - actually i cant bother how much theyre paid but their knowledge is deeeeep - probably professionals assigned to monitor and report back on unconventional and innovative ideas and suggestions from our Indian members ( very valuable to photo-copy cats ) ? 
