Yu Tingchun “Flying Fish Chinese Character Prediction Collection” 305 pages

Yu Tingchunhe’s article “Chinese Character Phenomena and Number Prediction” page 128

Flying fish teacher Yu Tingchun’s 2015 internal operations research materials Qimen new strategy 76 pages double-sided

Yu Tingchun “566 Classic Cases of Feiyu Qimen Operational Research Secret Technique (Collector’s Edition)” (1).pdf