The role of drinking green tea is as follows: 1, can clear heat and defeat fire, because green tea from the point of view of Chinese medicine, food therapy on the cold side, for the body on fire caused by a sore throat, red eyes, mouth ulcers, people properly drink green tea, through the defeat of fire and to relieve the role of the above symptoms. 2, can invigorate the spirit, because green tea is rich in tea polyphenols, and tea polyphenols for nerve stimulation is very obvious, 3, can provide the body with trace elements, such as zinc, selenium, fluorine, and these trace elements constitute a lot of enzymes and coenzymes in the body to regulate the role of the body. 3, to supplement the body with trace elements, such as zinc, selenium, fluorine, and these trace elements constitute the body of many enzymes and coenzyme components, and thus for the regulation of metabolism in the body is very obvious.