Geography, how to find the longitude of the direct point of the sun in some solar terms

It should be latitude. When the solar term is vernal equinox (about 2 1 March), the direct point of the sun is on the equator; On the summer solstice (around June 22), the direct point of the sun moves northward and reaches the Tropic of Cancer. Around the autumnal equinox (September 23rd), the direct point will return to the equator and eventually move south. In the east of the sun, the direct point will be in the tropic of Capricorn. Supplement: In addition, find the longitude. If it is a solid earth, it is divided into 360 degrees, which is determined according to the rotation direction of the earth. Generally, 180 degrees appears, and the earth turns from west to east, adding 180 degrees to the left and subtracting 180 degrees to the right.