Also known as the Pericarpium citri reticulatae, chen pi refers to the dried peels of Citrus reticulata Blanco and its cultivars, one type of rutaceous plants. In China, it mainly grows in Guangdong, Fujian, Sichuan, Zhejiang, Jiangxi and other provinces. The best timing for harvest is when autumn changes into winter. At that time the fruits are ripe enough. Next, dry them in the sun or beside a fire. As far as the quality concerned, the older the better. That is also the reason why it is being called Chen Pi, which translates literally as the old peels. And because the product from Xinhui is the best in quality, it is often called Xinhui Pi or Guang Chen Pi. Normally it is cut into shreds before the serving, in the raw form usually.