1, high barrier packaging material: the use of plastic film or composite material with high barrier performance can effectively isolate air, moisture and odor, and ensure the quality and taste of food.

3. Vacuum or modified atmosphere packaging: Put the dried bean curd into a vacuum or modified atmosphere packaging bag, remove air and seal it to prolong the shelf life of the food. This packaging method can keep the original taste and shape of food and prevent oxidation and bacterial pollution.

2. Smart labels and sensors: Through smart labels and sensor technology, the concentration of oxygen and carbon dioxide gas and temperature parameters in food packaging can be monitored in real time, so as to know the preservation state of food in time and ensure the freshness and safety of food.