There are two origins of Qi: congenital (or Primordial) and acquired. Congenital Qi is inherited from one’s parents. This intangible Qi, stored in the Kidneys, exists from the moment a new life is formed. Acquired Qi is produced after birth, from the Essence of food and water transformed by the Spleen and Stomach, the air inhaled by the Lungs, and the energy transformed from the universe.
Congenital Qi and acquired Qi are just two sources of Qi. Qi production is influenced by the inter-transformation among Essence, Qi, Blood, Body Fluid, and the functions of the five viscera.