What does the term 'Nei Ching' refer to in the context of Chinese medicine?

'Nei Ching' refers to a foundational text in traditional Chinese medicine known as the "Huangdi Neijing" or "The Inner Canon of Huangdi." This ancient medical text is considered one of the most important sources of medical knowledge in Chinese culture, laying out the theoretical framework for the practice and understanding of various aspects of traditional Chinese medicine, such as acupuncture, herbal medicine, and the principles of yin and yang.

The significance of 'Nei Ching' lies in its comprehensive view of health, illness, and the interrelationship between the human body and the universe. It serves as a guide for practitioners to diagnose and treat various conditions based on deep knowledge of human anatomy, physiology, and the concept of Qi (vital energy).

Other options do not accurately capture the essence of 'Nei Ching.' While diagnostic methods, herbal remedies, and forms of acupressure are significant components of traditional Chinese medicine, they do not encompass the broader medical knowledge and theoretical foundations that 'Nei Ching' provides.