This video discusses the lesser-known medical contributions of Zhiyi (538–597 CE), primarily recognized as the systematizer of Tiantai Buddhism. Zhiyi’s genius lay in his integration of Indian Buddhist and Ayurvedic medical theories with the existing Chinese system of Qi and the Five Elements. His most enduring medical legacy is the Liu Qi, or Six Healing Sounds, a unique contemplative medical practice described in his manual, the Mohe Zhiguan. This practice involves shaping specific exhalation sounds (e.g., Xu or Chui) to create distinct vibratory frequencies that target and treat imbalances in specific organs like the liver or kidneys. Essentially, Zhiyi developed a system where controlled breath acts as clinical medicine, predating modern Western measurements of sound frequency’s effect on the body.