Crystals in cold water are natural food extracted from the cell wall of deep-sea red algae. Round in appearance and chewy in taste, it belongs to very good food. It gets its name because cold weather must be made in a cold and dry climate in winter. When it is cold, it is easy to get full when it meets water, and its water absorption is as high as 200~250 times, which is 20 times stronger than that of ordinary foreign dishes. In cold weather, there is no upper limit for low calorie and low calorie intake. High fiber can increase the amount of defecation, just apply oil and starch. In addition to being eaten directly in drinks, bean jelly can also be made into jelly with fresh fruits, and can be combined with existing dishes to make universal sauce, which can replace the white powder of glutinous rice, and has the functions of locking delicious capsules, solidifying soup and replacing noodles to increase satiety, and can be eaten directly.