What's the difference between the Western 12 constellation and the China 12 constellation?

The traditional Chinese zodiac in China and the western Chinese zodiac are completely different concepts, which have nothing to do with each other. The twelve constellations in the west are based on the date of birth, and each person corresponds to a constellation. The time of each constellation is one month in the Gregorian calendar, and the twelve constellations are a cycle, which is exactly one year. Although China also has the zodiac, the zodiac is used to record the year, and each year corresponds to a zodiac, so the zodiac cycle is twelve years, that is, twelve years is a round. A flower lasts for sixty years, which is exactly five rounds.

Month, day and hour also have corresponding earthly branches, so there will also be corresponding zodiac signs, but when you ask someone's zodiac sign, you mean the zodiac sign of the person's birth year.