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In
ancient China, tea was regarded as one of
seven daily necessities, along with firewood,
rice, oil, salt, soy sauce and vinegar.
But from very beginning, tea was used as
medicine. At initial stage, the ancient
man drank it to relieve poison. The ancient
medical book, Shen Nong Bencao Classics
says that tealeaves taste bitter and so
can make people spirited and think clearly.
In Eating Classics, Hua Tuo says that the
continuous drinking of bitter tea is good
for thinking.
This
article by Yang Tianqing and Daniel Kister.
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