Why is Liu Yao's prediction correct?

Six-hexagram prediction is a common induction of three fields: heaven, earth and man. The premise of correct prediction is to ensure that the prospector concentrates on what he asks, and to require the forecaster to have a stable field, so that the divination obtained at that time and locally can be correctly reflected and the forecaster can correctly interpret the divination. Six-hexagram prediction method is called the bulk method of Yijing prediction, which has been verified for thousands of years.