Renminbi cannot be sold after purchasing foreign exchange. According to the provisions of Article 25 of the Regulations on the Administration of Renminbi in People's Republic of China (PRC), illegal trading of Renminbi in circulation is prohibited. Even if you buy foreign exchange, you cannot sell it. Only renminbi that has stopped circulating can be bought and sold. Renminbi is the legal tender in People's Republic of China (PRC), and the People's Bank of China is the national competent authority for the administration of Renminbi, responsible for the design, printing and distribution of Renminbi. The unit of RMB is yuan, and the secondary currency unit of RMB is jiao and fen. 1 yuan equals 10 angle, 1 angle equals 10 minute.