Dr. Yang, Jwing-Ming is a renowned author and teacher of Chinese martial arts and Qigong. Born in Taiwan, he has trained and taught Taijiquan, Qigong, and Chinese martial arts for over forty-five years. He is the author of over thirty books, and was elected by Inside Kung Fu magazine as one of the 10 people who has "made the greatest impact on martial arts in the past 100 years." Dr. Yang lives in Northern California. David W. Grantham has been training in martial arts for twenty-one years. He currently holds Certificates as Coach Instructor and Chin Na Instructor and teaches at the Hunterdon Wellness Center in Clinton, New Jersey. He offers privates, classes and seminars on Tai Chi Ball and Chin Na. David Grantham resides in Hunterdon County, New Jersey with his wife and two children.