[morpheuskafka]

The timezone checks for Shanghai and Urumqi, but not Hong Kong. All of these are the same actual time (China does not use time zones internally), not sure how these three were picked (why not Beijing or Macau etc). And all of them are prohibited by ToS, so not sure why they only flag mainland time zones.

Interestingly, my device is in Shenzhen right now, but macOS has assigned Shanghai as the "closest city" rather than Hong Kong which is geographically closer. I am curious if there is any documentation on how that is assigned.

[vianchen]

Because HK is highly autonomous. If say mainland China decides to observe different time zones, Asia/Shanghai and Asia/Hong Kong would diverge. Of course, that is very unlikely to happen in the foreseeable future.

[est]

or Singapore/Perth