Hla, a Burmese herbalist and acupuncturist, has written in to tell us about cinnamon in Chinese medicine.
"Cortex Cinnamomi Cassiae, or Rou Gui as it is known in Mandarin, is the inner bark of Saigon cinnamon. Its properties are Acrid, Sweet and Hot. It enters the channels Kidney, Spleen, Liver and Bladder. It warms the Kidneys and fortifies the yang, is used for deficient ki yang which can lead to cold, weak legs and backache. It warms the Middle and warms the Spleen and Stomach and dispels abdominal pain and diarrhoea.
By warming the channels it promotes menstruation and alleviates pain. It is THE herb in a major formula in Chinese medicine that helps to return fire back to its source (that is Big!) and is used for deficient kidney yang."