After all, is it sun time or Beijing time?

Theoretically speaking, when it is a place, it is more accurate to regard the sun as a place, and then historically, when the ancients used it, so I have always been inclined to local time, but it is not the first time I have encountered some places that are inconsistent with actual experience and Beijing time, so I used to think that this question is whether local time has more to do with nature, and Beijing time has more to do with the day after tomorrow, because we are accepting Beijing time now, which is just our psychology.