Your first post on this forum and you call 17 people suckers?
I am simply stating reality. China and India are both doing very well in terms of the Economy... why would either side want to start a conflict? There is nothing to gain, and everything to lose.
China already has enough internal problems, with the Xinjiang/Tibet separatist movements, and even worse, the unrest coming from low-income Han Chinese who feel victimised by the Hukou system.
If we "somehow" managed to annex Arunachal Pradesh, we would face hundreds of riots every week from the native population in AP. It would be far worse than the unrest in Kashmir. It would sink our reputation in the eyes of the global community.
Also, the international community would condemn China and sanction us, which would hurt our economy badly. It would also put at at significant risk with regards to an Indian counter-attack.
In short, China has everything to lose, and nothing to gain by attacking Arunachal Pradesh and that is simply a fact. China only cares about what is good for China, and keeping the economy strong is the number one priority. No one wants a destructive war, everyone would lose something from that.
P.S. I think it is GOOD that India is improving its military strength in the NE, since that will provide better infrastructure for the region (roads etc.), create jobs, and increase the flow of money within the military industry and benefit the Indian economy as a whole. Military spending will boost the economy of the whole region and improve the lives of ordinary people, so why would I complain about that?