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"Qi (&amp;quot;chee&amp;quot;) is one of the vital substances of traditional Chinese medicine. It is substance without structure and exists somewhere between matter and energy. It cannot be measured. Learn more about this life force and the role it plays in your health."^^<http://www.w3.org/2001/XMLSchema#string>
<http://health.howstuffworks.com/wellness/natural-medicine/chinese/qi4.htm>