Huada Enterprise is located in Taizhou City of Zhejiang Province along the coastal areas of East China. It is a golden place with the flourishing economy. Huada is the earliest scientific research, commerce and trading entepri-se group that researches into and produces Fresh Products of Modified Atmosphere Packaging Equipments in China. We scientifically utilize the extensive air in Nature, adopt carbon molecular sieve to switch over and separatemolecu-le through PSA Pressure swing adsorption. We automatically extract pure nitrogen, implement vacuum and high purity nitrogen filling packaging to the goods through the work programs of various types of packaging machines. We store and keep the freshness of various fresh fruits in granule, powder and flake forms. With our packaging, the fruits, pharmaceuticals, chemicals, native products, electronic components etc. Resist oxidization, rust, toxicon and damp-ing.