They are Hangzhou black paper fans. They are not made of just any blackpaper. It comes from the bark of a mulberry tree with a long fibre which gives it great tensile and strength.

• 是杭州黑纸扇，但却不是一般的黑纸做的，而是桑树皮。桑树的长纤维给扇子以张力和强度。