Freeze drying is the process of pre cooling and freezing a substance rich in moisture into a solid, and then sublimating its moisture from the ice state to the vapor state under vacuum conditions for dehydration, the substance itself remains in the frozen ice shelf, so its volume remains unchanged after drying and becomes loose and porous. As freeze-drying is carried out under vacuum (with minimal oxygen) and low temperatures, some easily oxidizable substances are protected, and many heat sensitive substances such as proteins and microorganisms do not undergo denaturation or loss of biological activity.

Freeze drying technology has been widely applied in various fields such as medicine, biological products, food, active substances, nanomaterials, etc., and its application scale is constantly expanding rapidly.
Raw materials: various fruits and vegetables, meat products, aquatic products, flower tea, fresh Chinese herbal medicine, etc.
Solid powder: fruit and vegetable powder, solid beverage, probiotics, flavors and fragrances, Chinese herbal extracts, etc.
Dairy products: such as colostrum powder, freeze-dried milk powder, cheese, lactoferrin, etc;
Health products: bird's nest, Cordyceps sinensis, ginseng, pilose antler, Ganoderma lucidum, royal jelly, turtle powder, soft shelled turtle, etc.
Pet foods: dog food, cat food, pet snacks, functional pet freeze-dried foods, etc.
Others: reagents, cosmetics, engineering materials, nanometer materials, polymer materials, rare earth materials, etc.