 This book gave very detailed insights into the development of Da Sheng Pi Gua Kung Fu and provided information obtained directly from Gan Dak Hoi himself etc.It also provided information on ALL students who were trained by Gan Dak Hoi and which ones were certified to teach Da Sheng Pi Gua Kung Fu.The Federation continues to update this family tree with the modern day students who have mastered all five variations but only those from the lineage previously certified by Gan Dak Hoi.