Can "qi" be used outside the human body?

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Can "qi" be used outside the human body?

 

Qi is like an energy flow.   But it seems qi can only flow inside the human body.   Some people thought that qi can jump from one body into another body.

What if it is true?

If the world is not turned upside down because of this,  the science of medicine may be.

Some qi masters have the experience that they will feel tired or even exhausted after they had used qi in healing.

Qi is an energy not fully understood.

The question is:  is the science of qi marketable?

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