Sun out. According to the query related public information: elm mushrooms she has two drying modes, one is natural sun drying, the other is drying, the former sun out of the mushrooms dark color, hard taste, mushrooms curled curled up, the latter 3-4 hours of fast drying, greatly retaining the color of the mushrooms, the taste and texture of the aroma of the drying box into the drying box what kind of what kind of what comes out of the drying box, soak up fast, soft texture, so drying of the mushrooms called the top quality! So the dried mushrooms are called top quality, good for gift giving.