This paper doubts the statement "Mylabrisis cold in nature", which is mentioned in ?Shennong Classic of Materia Medica, and argues that it is heat, not cold.

Annotation of Materia Medica has a three-volume version and a seven-volume version. New Materia Medica was written based on the seven-volume version of Annotation of Materia Medica.

PRIMITIVE COMMUNES  Tea was discovered by human during the B. C. 28 century the Chinese Shennong Time.  the Herbal Lection by Shennong quotes : I tasted many herbs and was poisoned. tea healed me.