But it isn’t China’s biggest, most urgent, and most dangerous security threat is it?
India have its disputes with China, sure, but from a geopolitical standpoint, India’s own agenda have created many inconveniences for China’s only peer geopolitical rival, the United States, on issues like Ukraine, finance, cyber security (saar your computer have virus), trade, and influence. And as your sayings goes, the enemy of my enemy is, well, if not my friend, at least should die second.
As Mao puts it, the goal of diplomacy is to make a lot of friends and have few foes. India is a threat, a competitor, but not yet a rival or an enemy. It would be shrewd for the Chinese to approach the issue with patience and subtlety (as I believe they will given their track record)