a folding fan的用法和样例：
- The whole book was evenly fold into rectangle form so it can be opened and closed like a folding fan.
- The "hua" would hold a folding fan and a handkerchief, while the other three roles hold another kind of stage prop.
- Except for laokuai, who hold a wooden club, all others dance with a folding fan in their hands.
- Can you show me a folding fan?
- The fastening or opening covered by such a fold.