Regarding China backing Pakistan, I think it can never stop. Just recently I have read that China has invested about $56 billion in Pakistan and Pakistan-occupied-Kashmir for developing infrastructure, whereas when Indian PM went to China for investments, he has been handed only $20 billion. Chinese and Indian army are already engaging one on one on the borders. Chinese intrusion in Indian borders have lot of evidence.
Pakistan has been prostituting to China for many decades now, and that is why China is showering them with so much investment. Ever heard about the Shaksgam Valley (Trans-Karakoram Tract)? It was a strategically important piece of land in the Kashmir region, which was under the control of Pakistan. The Pakis sold it to China for peanuts.
Not even that, even China is holding on to a large piece of Kashmir which they captured during India-China war in 1962. The dispute between India and China is so old, that it is not possible that it will get under shelves just because of the change in government. I am sure during this new Indian government, the war is bound to happen. Either China or Pakistan or both of them will attack India for sure.