Cunningly cheating the system of the futenreki (the Futian calendar table), they concocted a fake Chijun-ho (a calendar technique of setting a leap month and leap day) while insisting that they were following kuden (oral instructions) or secret teachings they had inherited.
符天暦の仕組を巧に用いて「口伝・秘伝」と称して本来あり得ない置閏法の設定などをした。