Who is the original author of the plum blossom easy number?

Shao Yong <1011-1077) was a famous master of Yi Studies in the Northern Song Dynasty. He is knowledgeable, and he has learned from ancient times to the present. He was one of the founders of Neo-Confucianism in Song and Ming Dynasties. He has profound attainments in the discipline of Shu Shu, such as The Book of Changes of Plum Blossoms and The Iron Book of Gods.