Perennials are also known as preserved flowers, eco-flowers, or "never dying flowers" abroad. The fresh cut flowers such as roses, carnations, phalaenopsis orchids and hydrangeas are processed into dried flowers through a series of complicated processes such as dehydration, decolorization, drying and dyeing, etc. The color, shape and feel of perennials are almost the same as those of flowers, and they maintain the qualities of flowers with richer colors, higher usage and preservation time of at least 3 years. It is the most ideal product for floral design, home decoration and celebration. Everlasting flower products have been sought after by consumers since they appeared in Germany in the last century.