Distinguish between lunar and solar constellations.

Gregorian constellation was not invented in China, but in ancient Greece and then spread in Europe. The zodiac (or zodiac) is determined according to the position of the sun in the starry sky, and in a tropical year, the sun basically transits in the starry sky. The Gregorian calendar determines the calendar year according to the tropic year, while the lunar calendar, which is usually called the China old calendar, also takes the tropic year as the average calendar year, but a year is the accumulation of twelve or thirteen moons, which is quite different from the tropic year.