1. Wait for the cooked rice dumplings to cool down, prepare water and plastic bag, put the cooked rice dumplings into the plastic bag to seal.

2. Leave a small opening when sealing, put it into the water to squeeze the air, and don't immerse the small opening into the water.

3. Close the bag all the way in the water and finally take it out of the water.

Vacuum packaging, also known as decompression packaging, is the packaging container of all the air out of the seal, to maintain the bag in a high degree of decompression, air scarcity is equivalent to the effect of low oxygen, so that microorganisms do not have the conditions for survival to achieve the purpose of fresh fruit, no disease and rot occurs. The application of plastic bags within the vacuum packaging, aluminum foil packaging, glassware, plastic and its composite material packaging. Packaging materials can be selected according to the type of goods. As the fruit is fresh food, still in respiration, a high degree of oxygen deprivation will cause physiological diseases, therefore, the use of vacuum packaging of fruit less.