US isn't exactly short on intelligence bases around the world. a couple of more on India side of border won't do too much.That's like saying Chinese help to US in spying on Soviet Union wasn't helpful. India allows US to build intelligence bases across from Tibet and Xinjiang, this is very detrimental to China's security. If intelligence bases aren't useful, why does the US build so many of them?
People need to relax a little bit. There is not much China can really do about India cooperating with US, but nothing it needs to be alarmed about either. I will get more alarmed about this if I actually respect India's security apparatus.