Generally speaking, the shelf life of the packaged Dahongpao is based on the date on the package, which is generally more than one year. If the package is strict, it can be kept for up to 4 to 5 years. \x0d\ Dahongpao tea has strong adsorption and is easy to absorb peculiar smell. In addition, the aroma components of tea are mostly formed by in-process processing, so it is unstable, and it is easy to be naturally dispersed or oxidized and deteriorated. Therefore, it is suggested to use the following methods when preserving the unpacked tea: \x0d\ 1. Use a drying oven for storage: because the temperature of the drying oven is stable and it is isolated from the air, put the tea in the drying oven. \x0d\2. Storage with thermos: Clean the thermos, then pour the tea to be stored into the thermos, and plug it for storage. \x0d\3. Storage in refrigerator: To maintain the freshness and fragrance of tea, it is best to store it at low temperature, especially the tender tea such as Longjing, Biluochun and Huangshan Mao Feng. It must be noted that the refrigerator for storing tea leaves must be sanitary, clean and odorless, and it can't store anything other than tea leaves. \x0d\4. Storage in jars: First, pack a small amount of tea leaves in small jars so that they can be taken at any time, and then seal the rest in large jars for storage. \x0d\ It is best not to use glass jars, porcelain jars, wooden boxes or medicine jars for the preservation of Dahongpao, because these utensils are light-transmitting, moisture-proof and fragile. It is best to keep it in a dry jar or refrigerator.