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Express News Service From land to sea, from space to cyberspace, China is en route to world domination. At least that’s what Comrade Xi wants. China owns more supercomputers than other nations. Now its quantum computer Jiuzhang has reportedly achieved quantum supremacy by completing a calculation in 200 seconds that would take a supercomputer 2.5 million years. Jiuzhang used 50 photons, 100 inputs, 100 outputs, 300 beam splitters and 75 mirrors to beat the computing capability of Sunway TaihuLight, again a Chinese machine, which would have taken time equaling one-fifth of the total age of t...