The answer is yes. Long-term food will inevitably not be fresh and affect the taste. Most importantly, it also affects our health. The traditional way of keeping fresh, even if stored in the refrigerator, which can only delay it for a day or two The result will still be moldy Fundamentally it deals with food preservation and odor problems The key is to suppress bacteria! Bacteria need oxygen to reproduce, start from the root! That is to use a vacuum packaging machine . The principle of vacuum packaging is to isolate it from the air. Inhibit bacterial reproduction.