In this historic document, Sifu Tim Tackett, one of the instructors with more knowledge about the martial art Bruce Lee Jun Fan Jeet Kune Do, teaches us the basic structure of Art, which is essential for their understanding. Sifu Tackett explains in detail the principles and foundations, highlighting the "secrets" on Jun Fan JKD and from which all attacks and defenses become highly effective. An excellent teaching and more than 30 years of experience as an instructor at JKD endorse this work instruction that surprised many for being so "open".