longan is one of putian's most celebrated fruits and a major cash crop. in addition to being enjoyed fresh, longans are processed into a variety of products marketed far and wide, with "xinghua guiyuan" (xinghua dried longan) being particularly renowned.
the production of dried longan in putian features a unique technique called yaosha, or "sand-shaking." this process involves placing water-soaked longans into a special tumbling basket with fine sand. as the basket is shaken and rotated, the sand gently abrades the rough outer surface of the peels.
this treatment allows the fruit to dry more easily and evenly, resulting in a finished product with a smooth, glossy exterior, a beautiful color, and a highly appealing appearance.