Living Between Giants

The Research Question:
How does Bhutan survive from being over intervened by China and India?

The Hypothesis of Mine:
I here make an assumption that Bhutan, realizing itself as a weak power in the region, alone cannot defend
itself from the incursion by PLA into the undefined border areas, uses India, the biggest competitor of
China in the region, as a check and balance against China. On the other hand, India is also using Bhutan as
a buffer zone to against China in case of any future warfare. By extension, I think to some degree that
Bhutan to India resembles that Pakistan to China.