Look at the following figure, and it is finished: the solar terms shown in the figure may be _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Look at the following figure, and it is finished: the solar terms shown in the figure may be _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Winter solstice 30 degrees east

The point where the Polaris light is directly opposite is the North Pole. This picture is a side view, and 0 is the meridian. The line where A is located is the morning line. The sun's rays show that the direct point is located in the southern hemisphere, and the solar term is winter solstice.

A is located on the morning line. At this time, the day length is 8 hours and the sunrise time is 8 o'clock. The longitude of the meridian where the direct contact is located in the figure is 90 east longitude and the local time is 12 o'clock. It can be calculated that the longitude of the meridian where A is located is 30 E.