why are the chinese buying s-400? and exporting HQ-9 why not use it themselves?
http://china-defense.blogspot.com/2009/05/first-photos-of-s-400-in-china.html
India does not have tense ties with China, USA may want India to have tense ties but that is not the reality, the reality is China is a bigger trading partner than USA with Indian-Chinese trade approaching 60 billion a year with an expected growth rate of 15% it could possibly reach 100...
I hope Indian government acts quickly, this kind of thing can turn into a disaster very quickly and the infrastructure and healthcare system cannot handle anything like this.