[Retric]

China:

  ~94% of 1.357b = 1.28 billion population. 
  ~40% of 3.7 mill = 1.5 million square miles.
  = ~0.85 billion people per million square miles.

India

  1.252 billion people on
  1.269 million mi
  =~ 1 billion people per million square miles.

So, India is around 15% denser. Of course you can avoid the strait line cut and push China's density much higher, but the point is they are not that far off where people actually live.

[vacri]

Where are you getting the 40% figure from? Are you saying that Tibet(-ish) is 60% of the land area of China?

[Retric]

Eyeballing: http://www.undertheraedar.com/2012/06/population-of-china.ht.... Tibet is part of that side with 6% of the population, but rainfall is a major issue limiting population over a much larger area.