When did Zhouyi originate and who studied it?

At present, it is said that Fuxi created it. Creation, Tai Chi gave birth to two instruments, two instruments gave birth to four elephants, and four elephants became gossip. At that time, there was gossip that Gan Kun had left Kang En. In Shang Dynasty, Zhou Wenwang was imprisoned for eight years, some people say it was fourteen years. Fuxi gossip is superimposed up and down, and it becomes sixty-four hexagrams. Later, Confucius and his disciples wrote an article explaining and expounding the sixty-four hexagrams in the Book of Changes. Just like my mother, it formed many branches later. Forget philosophy, its main function is prediction. For example, the six hexagrams in the Han Dynasty, the eight characters in the Tang Dynasty, the plum blossoms in the Song Dynasty are easy to count, the big six are expensive, the Taoist skills are magical, the number of Chinese characters is small, physiognomy, feng shui and so on. All of them are decomposed from Zhouyi, and the basic thing of Zhouyi is the five elements. Orientation is always inseparable from gossip. Although later Feng Shui masters refined the Eight Diagrams into twenty-four mountains, Zhouyi actually mastered the golden mean, and the eight characters were also necessary. Too many ups and downs are not good. Six elements are used to restrict and measure the changes of the sun, the moon, the heavens and the earth, and to predict them through factors such as birth and death. Eat, that's all.