有7种面值。它们分别是100元、50元、20元、10元、5元、2元，它们都是纸币，而1元的既有纸币也有硬币。

• There are seven denominations. There are one hundred-yuan, fifty-yuan, ten-yuan, five-yuan and two-yuan, all are in notes, and one-yuan is issued both in notes and coins.