XO stands for year Samsung Cognac: the storage period is not less than two years. V.S.O.P Cognac: The storage period is not less than four years. Napoleon cognac: the storage period is not less than six years. X.o. cognac: the storage period is more than eight years. F stands for good V stands for very good O stands for old S stands for superiority. X stands for EXTRA XO, which is a grade representation of grape distilled liquor (brandy) and the abbreviation of Extra Old, meaning "extremely old". Brandy is roughly divided into three grades: the first grade is V.S., that is, three stars. According to relevant French laws, the minimum age of original wine when blending cognac is at least 1.5 years. The second grade is V.O. When blending, the minimum age of the original wine is at least 4-4.5 years. The third level, X.O., Napoleon, Etra and so on. , is a very old brandy, called fine or best. When mixed, the minimum aging time of wine is more than 6 years. Therefore, X.O is different from vintage wine. Vintage wine refers to non-distilled liquor XO brewed from grapes harvested in a certain year. It is not a brand, but a strong liquor brewed from grapes, which is used in cognac and so on. It depends on how long the wine is stored in oak barrels. XO is the longest storage time, XO is the abbreviation of aged wine, followed by XOP and VS, and Napoleon is the shortest storage time. Both X.O. and V.S.O.P are the grades of brandy storage year, but they are not the grades of red wine year.