Bird's nest are a common cause of chronic illness , disease , elderly and weak. The strong ones often feed the Bird's Nest. Bird nests are rich in protein and nutrients. Naturally bird's nests non combine other chemicals and medicinal properties, thus It is very good for health. Colds and flu can be cured. Since it is a medicinal product, it is extremely valuable and can be purchased in gold. Bird's nest are used not only for local but also for export.