This book presents a comprehensive exposition of Zhineng Qigong, a modern system of Chinese energy practice that integrates traditional qigong philosophy with contemporary scientific perspectives. The author explains the concept of qi and the theoretical foundations of the method, drawing parallels between ancient cosmological ideas and modern physics. Through detailed explanations and practical insights, the work aims to guide practitioners toward understanding the relationship between mind, body and energy. By combining theory, philosophy and application, the book serves both as a reference for experienced practitioners and as an introduction for readers interested in holistic health, meditation and internal energy cultivation. The volume is structured as an extensive study of the principles and practice of Zhineng Qigong, beginning with a theoretical discussion of qi, cosmology and the philosophical background of Chinese internal arts. Subsequent sections analyse the scientific interpretations of energy and matter, connecting classical teachings with concepts from modern physics and biology. The book also examines the development of the Zhineng Qigong system, its methods of training and the broader context of qigong practice in contemporary society. By combining theoretical exposition, explanatory examples and detailed descriptions of practice frameworks, the work functions both as a scholarly overview and as a practical guide to understanding this specific tradition within the wider field of Chinese internal cultivation. Ooi Kean Hin is a Malaysian pharmacist and certified qigong therapist who has been actively involved in the study and teaching of Zhineng Qigong since the late twentieth century. Based in Penang, he established a qigong centre and has conducted training programmes, lectures and therapeutic sessions related to traditional Chinese energy practices. His work aims to bridge practical healing methods with theoretical understanding, and he has contributed to the international dissemination of Zhineng Qigong through teaching activities and publications focused on health, meditation and internal energy cultivation.