> The fun part will be extending it to track and apply to foreigners, even outside of China. > It's a very small thing to make people second-guess a critical b

> The fun part will be extending it to track and apply to foreigners, even outside of China. > It's a very small thing to make people second-guess a critical blog post or Reddit comment about China in case they ever want to visit or do business with a company that has any Chinese presence. That would be difficult to extend to activity in non-cooperative regimes. China has been working to de-anonymize internet access by making phone numbers traceable to national ID numbers, network connections/IP addresses traceable to phone numbers [1], and forum posts traceable to IP addresses. I think it's unlikely that they'd be able to automatically trace a pseudonymous post on reddit made by an American in the US to a particular US passport number to factor reddit posts into a social credit score at a large scale. However, they might be able to do it for public posts on a real-name policy site like Facebook. With facial recognition and a real name, they could probably reliably match an account to a passport to sanction posts they dislike. They'd probably be fine with any false positives due to fake accounts, etc. [1] e.g. to connect to airport wifi, the landing page asks for your (local) cell number, and texts you a code for access.