> Chinese vessels regularly violate territorial waters, and there is an ongoing spat with India around their borders.

If you are talking about India's spat with China in terms of territorial waters, I think the general consensus is that India is in excess of international law with its claims and China is conducting legal freedom of navigation operations just like the US does.

The SCS is an entirely different issue, where both China and Taiwan have made territorial claims that are largely illegal under international law.