This book was written by Zhang Lie. The first part consists of the theory and principles of Yin Fu Style Baguazhang. The second part consists of the Baguazhang 64 Forms and the Stretching the Tendons Maintenance Qigong. The 64 Forms is eight sets of eight palm changes. Sets 1,3, 5, and 7 concentrate on upper body techniques and sets 2, 4, 6, and 8 concentrate of kicking techniques. Stretching the Tendons Maintenance Qigong has nine palm changes designed for health maintenance.