No, it is possible to reissue foreign exchange bills by converting US dollars into RMB. If they are lost, there is no risk. Because some important information on them is mosaic, you can apply for a reissue bill at the bank. The legal tender in People's Republic of China (PRC) is RMB, and the People's Bank of China is the competent authority of RMB, responsible for the design, printing and distribution of RMB.