Let's to forget this long article from just over a month ago, outlining Microsoft's failings and seemingly willful neglect regarding cybersecurity overseas. https://www.lawenforcementtoday.com/bombshell-allegations-th...
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That said, I 100% agree that 1) relying on foreign national support staff to support critical USG infrastructure should not be allowed, and 2) all the big tech companies -- including the hyperscalers -- have deals with the PRC via domestic proxy businesses (Tencent, Alicloud, etc) in order to allow them to operate in China. There isn't enough oversight of these contracts, or the terms allowing Chinese hands-on access to the hardware & software stacks.