First of all, the bird's nest is a nest produced in Jin Siyan, and the bird's nest that has just been picked will inevitably be polluted by the environment, with impurities such as eggshell fragments, small black spots and swallow hairs. It is necessary to clean the bird's nest with pure water, and at the same time, gently brush the surface with a soft brush and carefully pick the hair to become a finished bird's nest. Therefore, a good bird's nest must be a pure natural bird's nest that has been manually cleaned and picked. According to industry data, the quality of bird's nest in Tongrentang and Fulinmen is very good, among which Fulinmen is famous for its high cost performance. In fact, the selection of bird's nest, good bird's nest, no matter where it is produced, must have a high dryness, and it will be broken if it is slightly folded. The higher the dryness, the easier it is to store, and it will not be moldy if it is placed in a cool place. Generally, high-quality strips are more than 6 times, and some even reach 8-9 times, depending on the quality, soaking time and technology of bird's nest. The inferior bird's nest, after being treated with liquid medicine or brushing glue, makes the texture of bird's nest destroyed, and it is not easy to foam, and the hair is small, and some even can't foam at all. So when choosing bird's nest, just remember: a good bird's nest should be thin and dense. The overall shape is very good, with a little fishy smell, dry to the touch, with a small amount of fine hair and fine corners. In addition, the color of bird's nest has shades and shades.

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