People in the south use Beijing time. The astronomical time in different places is different. Some are faster than Beijing time and some are slower than Beijing time. It is best to use astronomical time to calculate the real time. When calculating the horoscope Everyone has encountered this situation. It is also 12 o'clock Beijing time. The sun in the northeast is not due south, but has traveled west for about an hour. In places like Tibet, the sun doesn't rise for a long time. It seems unscientific if both places are counted as noon time. At noon, the sun should be due south. The time we commonly use is clock time, which is Beijing time (Central Plains time). This is the average solar time in a human-made standard time zone. When calculating horoscopes, if you are born at the beginning or end of a certain hour, the time calculated is often wrong due to the "true solar time difference". When measuring horoscopes, astronomical time should be used for birth time, not Beijing time (Central Plains time). Astronomical time has two meanings: local time and true solar time.
You know Beijing time, I can help you convert to true solar time, so the error will be small.