This animated graphic by T-Mobile is surprisingly interesting. What you see below is a static screen shot; the site itself says it offers a depiction of ongoing cyber-attacks
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Here's the policy point: Everything I've heard from cyber-security experts over the years has emphasized that China is one of many important sources of cyber-assaults, rather than being in an ominous category of its own. That's what this rendering also suggests -- but I think you'll find it interesting to check out for yourself.