Let me ask you something.

In summer and winter in Heilongjiang, Liaoning, Jilin, Inner Mongolia and Beijing, when is it dawn in the morning and dark in the afternoon?

This problem is not complicated.

First of all, China implements Beijing Time, or 40 degrees north latitude to be exact. The geographical location of Beijing is close to 40 degrees north latitude and 0/20 degrees east longitude.

In summer, that is, from March to September, the days in the northern hemisphere are longer than the nights. And the higher the latitude, the longer the day, so the dawn time is earlier than 6 o'clock in Beijing time, and it should be Beijing-Jilin-Liaoning-Heilongjiang from morning till night. The same is true when the sun goes down, later than 18: 00. In the same order.

Inner Mongolia is special. There are many latitudes that can't be compared.

In winter, the situation is just the opposite.