How to calculate Zhouyi gossip? With what props?

There are many divination methods of Zhouyi Bagua. Since the establishment of Liuyi in Fang Jing in the Western Han Dynasty, it has basically become the mainstream to vote for Liuyi with three coppers. Method one, three words are old yin, three backs are, one back is lack of yang, and two backs are lack of yin. Arranged from bottom to top, the first shake is Chu Yao and the sixth shake is Liu Yao.