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l(f)rg:2020-03-27 Դ: ӛȫ c
At the opening ceremony of the Beijing Olympic Games, China"s four great inventions-gunpowder,compass, papermaking technology and the art of printing-formed a major part of the celebrations to introduce the country to the world.
P(gun)~Mother Invention ԣͣ桡ɣ the invention of my inventionӢZ
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