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Amid its competition with the US, "there is no other road for China but to improve its education", he said.

Amazon’s stake in Seattle

Amazon’s total does include workers at its fulfillment centers around the world, so the comparison to other tech companies isn’t apples-to-apples, but the chart above shows just how much Amazon has grown in relation to both Microsoft and Google over that time period.

Among them are students returning to classrooms whose mental health care will need to be given special attention as they switch from long-time social distancing to something more like routine life spent at close quarters with classmates and others.

Amazon’s Greg Bulmash helps a young girl use hands-free technology via a Leap Motion device. (GeekWire Photo / Kurt Schlosser)