We all know many Indians belong to the category of one of the most stupidest people on this planet. And you have once again proven this premise to be true. Everybody with a decent knowledge of WW II know Europe in the aftermath was in total devastation. UK was in absolute no shape in the defense had Mao decided to launch a small attack reclaiming HK back.
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As for Macau
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Mao was a genius, HK became the Financial center of Asia and the rest is history. India on the other hand turned out to be the loser under UK rule. When the British left did Mumbai became the hotspot of South Asia? Your Mumbai is not much different than a slump hole compared to Shanghai.