1, Chenpi is the dried and mature pericarp of Rutaceae and its cultivated varieties. Small evergreen trees or shrubs of oranges are planted in hills, low mountains, rivers, lakes or plains. Distributed in various areas south of the Yangtze River. 10 ~ 12 when the fruit is ripe, pick the fruit, peel it, dry it in the shade or ventilate it. As a medicine, orange peel is good for people who are old for a long time, so it is named Chenpi and Guilao. Wang said, "It is better to keep the orange peel red for a long time, so it is called red-skinned tangerine peel."

2, commonly used tangerine peel soaked in water, can not only strengthen the spleen and regulate qi, prevent spleen and stomach qi stagnation, but also help digest food, and can dry and eliminate phlegm. If you have a cold and cough, it can also help relieve the symptoms of phlegm. If there are symptoms of thick and greasy tongue coating, it shows that qi deficiency of spleen and stomach leads to stagnation of body fluid and excessive phlegm, and dried tangerine peel can also be soaked in water to drink, which also has a certain health care effect.