This 2-hour streaming video lesson contains Lesson One from Dr. Yang's bestselling 6-DVD series, "Understanding Qigong". One In-App purchase to get the full contents. You'll learn about Qi and how to develop yours, including: Qigong History. What is Qi? What is Qigong? Feeling is a Language. Yin / Yang, Kan and Li. Three Treasures. Five Energies Toward Their Origins.