What's the difference between XC and X0?

1 and "XO" are the marks of brandy quality grade. Similar to the "first-class product" labeled by China products.

2. I have never heard that there are "XC" and "XO" signs with the same nature in foreign wine.

3. Since some netizens mentioned that French cognac is "blended wine", the so-called "blended wine" is a mixture of wines of various years. Didn't say "XO" is older than "VSOP". Besides, brandy is not red wine. Just because it is old doesn't mean it must be delicious. This is purely a kind of "corporate propaganda copy" hype carried out by Taiwan Province wine merchants in the early days for promotion.