This episode is about Zong Qi, also called Chest Qi or Great Qi, which arises from the combination of Gu Qi from the Spleen and air from the Lung. We discuss how Zong Qi nourishes the Heart and the Lung, controls the voice and promotes blood circulation. Weakening of Zong Qi causes three main problems: voice disturbances with soft voice and no desire to talk, failure of qi to move blood which gives a pale face or heart palpitations, and downward fall of qi which causes shortness of breath and extreme fatigue up to suddenly stopping breathing in severe cases. The most important principle: Zong Qi is essential for respiration, speech, heart and blood circulation, and when Lung Qi is too weak, insufficient Zong Qi can be formed.