It is not only India but Japan, Vietnam, Taiwan, S. Korea including US, Russia etc almost all big powers in the 4 corners of earth find China as a threat to its security!! So in the event of a war, I do not think it is going to be a cakewalk for China anymore!! Last time they crushed Vietnam because Vietnam did not have the backing of any Super powers including INdia militarily! Russia chose to keep a distance because they want aliance with China to fight the US. Now, the reality on the ground changed. US making its presence around China this time - be it in Afganistan, Iraq, Philipines, Japan or Taiwan/S. Korea. Chinese are not fools! IN the event of a war, there is a possibility of a grand aliance in the line with the aliance of the World War! China will be screwed up badly and its economic strength will disappear, world community may isolate China and all business partners of China will become hostile to China! I do not think, China will venture to anybody's territory in future including Taiwan!! Why cann't China attach Taiwan by force ? I think, China is heading towards the old USSR way!!
In our times, the mind of all countries is in economy and development. No country is planning to go backwards to stone age except Pakistan!