The Six Yao Bagua prediction is a rule summed up by the ancients by observing the laws of nature. It originated from the Najia system of Jingfang in the Western Han Dynasty. At first, 50 yarrow roots were used, but it was not until the Song Dynasty that "money was used instead of yarrow". The predicter puts three copper coins in his hand, clasping his hands tightly, thinking about what he is predicting, and letting the measured information be integrated into the copper coins. He puts his palms together and shakes them, then puts them into the hexagram plate and throws them six times to form the hexagram.