'Zong Qi' (Pectoral Qi) is formed from the combination of:
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A
Prenatal Qi (Yuan Qi) inherited from parents and postnatal Qi
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B
Grain Qi (Gu Qi) from food and air (Kong Qi) from breathing, gathered in the chest
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C
Wei Qi and Ying Qi merging in the Lungs
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D
Kidney Jing transforming into Qi in the thorax