Are there any websites and books to learn from Liu Yao?

You can go to the Cliff Yijing Feng Shui Research Institute to see Master Cliff's "Six hexagrams to predict the truth" and "Four pillars to predict the truth"

Characteristics of six-year forecast

Compared with four-column and eight-character prediction, six-column prediction is faster, simpler and more accurate. The six-year forecast mainly predicts single events, such as measuring fortune, getting married, an investment project, signing a contract, entering a higher school, getting promoted, finding someone, looking for a job, and so on. Generally, it takes only 10 minute for the prediction of six hexagrams from divination to the end of prediction, and 1 hour is the earliest for the prediction of four pillars and eight characters. And the six-year forecast can detect things that have nothing to do with you, such as the result of the ball game, the weather and geological disasters.