Military spending 2011 – regional infographic, top 10 military spenders

USA spends 5.2% of their GDP on defence.

China spends only 1.5% of their GDP on defence.
If China spends also 5.2 of their GDP on defence it will be about 500 billion USD.

China: $145 billion
Japan: $70 billion
Russia: $56 billion
India: $36 billion

Another list of global military spending [1]

Another list of global military spending [2]