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With PODs anytime you want, make present-day Europe and Middle East each has population more than one billion, while present-day China and India each has around 300 - 500 million population.
FYI, population of OTL Europe is around 500 million, while Middle East is 300 - 400 million.

"Europe" in this thread is defined as in the map below, WITHOUT European Russia:
http://upload.wikimedia.org/wikipedia/commons/d/de/Europe_orthographic_Caucasus_Urals_boundary.svg

While "Middle East" is as the most dark green in map below, so Libya, Algeria, Sudan, Pakistan, Afghanistan, and Central Asia are NOT included:
http://upload.wikimedia.org/wikipedia/commons/8/8e/Greater_Middle_East_(orthographic_projection).svg

Both "China" and "India" are defined roughly as the area of modern-day nations of PRC (plus Taiwan) and India (plus Ceylon).
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