Chenpi, alias: orange peel, turtle old, red peel, yellow peel, wide orange peel, Xinhui peel, orange peel and wide orange peel. It is the mature peel of Rutaceae citrus 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. When peeling the tangerine peel, cut it into 3 to 4 petals. Pericarpium Citri Tangerinae is divided into "Pericarpium Citri Tangerinae" and "Pericarpium Citri Tangerinae".