Qi and blood as a teapot

Qi and blood are like the water cycle. I see it every morning as I have tea. Steam is qi. Water is blood. If the pot has little water it will have little steam. If there is no steam, water can't condense. If there is a little water it will heat quickly and become cold quickly. This is like a small teacup compared to a larger cup. If there is a lot of water it will hold the heat for longer. This is like the way blood holds yang qi. This is why heart yang becomes kidney yang. The steam of lung qi condenses to become kidney yin. If the water is dirty you drain it and refill. We do this as we remove damp and blood stasis. This is washing the old pot of its moldy leaves. How can we add water to rotten leaves? Then we refill water from the well. Huang qi is a well. Its roots go deep into the earth. Ren shen is a well. Its roots also run deep. They are like a pipe bringing the yin toward the yang. Clean the pot, then pipe in fresh water and add fire below the water. This is the process of yin and yang transforming through qi and blood.

Much of Chinese medicine is understanding gas and fluid exchange.

Huang qi has deep taproots from drawing water and minerals from deep in the earth.