Is MH370 in Central Asia?

This is the question that Slate is asking.

This thesis hinges on the idea that a large civilian aircraft flew across either Indian or Chinese airspace without either of the militaries noticing.

It would also depend on the aircraft flying close to the Indian-Chinese border, above Tibet, which is a tense and tightly guarded frontier.
Let's just say I am very skeptical.

16/3/14 UPDATE: No runways in Central Asia were even in range.