1. Fresh refers to goods that are put on the shelves without deep processing such as cooking, including bread, cooked food, fruits, dry goods, vegetables, meat and aquatic products. Among them, the preservation methods include cold water treatment, strong wind cooling equipment, cold storage, plastic wrap packaging and so on.

2. Fresh refers to products that are put on the shelves without further processing steps such as cooking and preparation, including fruits, meat, aquatic products, vegetables and dry goods. Even bread and cooked food are fresh varieties.

3. Preservation methods include ice-cold water treatment, ice salt water treatment, strong wind cooling equipment and plastic wrap, among which ice-cold water treatment is suitable for onion and garlic preservation, ice salt water treatment is suitable for aquatic products preservation, and strong wind cooling equipment and plastic wrap are suitable for vegetables preservation.

4. Precautions: In the process of selecting fresh food, the selection conditions also change according to different products. Vegetables should choose varieties with intact stems and leaves, fruits should choose varieties with intact peels, and aquatic products should choose products without breakage, blackening and odor.