This document provides an overview of Yin Yang theory and Wu Xing theory in Traditional Chinese Medicine (TCM). It discusses the history and basic concepts of Yin Yang theory, including how imbalances can lead to illness. Wu Xing theory and the five elements (wood, fire, earth, metal, water) are also explained. The presentation notes how TCM practitioners combine these theories to diagnose health issues and treat patients using modalities like acupuncture and herbal medicine, with the overall aim of restoring balance.