Why is there only 12 constellation left in constellation 88?

Although there are 88 constellations in the whole day, only the zodiac is located on the ecliptic, which is the only route the sun must pass through in the sky, so it is used to being called the zodiac. < br> Zodiac division date: Aries was born in the Gregorian calendar from March 2 1 year to April 91year. < br> The ancient sky in China was divided into three walls and twenty-eight nights. The Three Walls refer to Wei Zibi, Qiu Bibi and Shi Tian Bibi, and divide the 28 nights into seven nights of oriental dragon, seven nights of southern Suzaku, seven nights of western white tiger and seven nights of northern Xuanwu. This is the starry sky system adopted in ancient China. However, most of the constellations we are talking about now are evolved from the traditional constellations of ancient Greece. Note: the above content is feudal superstition, don't believe it.