China failed to get India on their side but it is not for lack of trying. The forum's attitude toward India is a result from these repetitive failures and the disproportional difficulty of befriending India for their national power. China do not discriminate. They even tried to befriend Japan who is a historical enemy, yet somehow India is harder to woo than Japan.
The case for India is a mental case not lack of carrot and stick. For countries like those best to leave them alone, isolate them until they have desire to "create the condition". This is doubly true because India refuse to commit to American either. If India refuse to join China, and also refuse to help China's enemy, then they are safe to be left alone. Whereas Europeans despite difficulties still need to be won over. If Europeans are not on your side they are on American side.
In summary India should be left alone by China for two reasons: difficulty/reward ratio to befriend is unfavorable, and lack of negative consequence to ignore.
