Official website, the Maotai Customization Center, said that, generally speaking, the longer the grain wine with a height (generally above 45 degrees) is stored, the more mellow the taste will be and the better the wine will be, such as 53-degree Tian Fei Maotai, 53-degree Maotai Cordyceps and 52-degree Maotai Fuman Four Seasons Wine. Low-alcohol or inferior wine is easy to deteriorate when stored for too long, which is not suitable for long-term storage. To identify whether the liquor stored for 10 and 20 years can be drunk. You can taste it after opening the bottle. If the taste is mellow, it is still a very good wine.