I think he subtracted 200 million for effect.
Here’s a link to wikipedia’s list which is slightly more recent by the looks of the numbers.
https://en.wikipedia.org/wiki/List_of_countries_and_dependencies_by_population
Let’s just take a moment to think about something here.
China’s population of 1.4 billion lives on roughly the same habitable portion of their country as do the 340 million in America. That is about half of the land mass in each case.
So China is on average four times as densely populated as America.
It contains 18% of the world’s population. When Hitler went to war with the world, Germany contained less than 1% of the world’s population, and the Axis perhaps 2-3 per cent.
These are factoids that any reasonable person would find disturbing in any context.
Let me correct my math there, Germany had perhaps 4% of the world’s population in 1939 (and was busy killing off a fair chunk of that), the Axis might have had 10% counting Japan which was not that solid an ally until 1941.
Anyway, China would not hesitate to wage war on population loss fears alone, they would come out of any war with a very sustainable population base especially as there would be little point in nuking their cities, military targets would be priorities.