The Problem with Time & Timezones - Computerphile - YouTube
https://www.youtube.com/watch?v=-5wpm-gesOYr/todayilearned - TIL that China has a single time zone for the entire country despite spanning five geographical time zones. It is known as Beijing Time locally and China Standard Time internationally.
https://www.reddit.com/r/todayilearned/comments/ab1utr/til_that_china_has_a_single_time_zone_for_the/