Sweet wine can be divided into different sweetness grades, from dry and semi-dry to very sweet and sweet, and the sugar content of each grade is different. Generally speaking, the sugar content per liter of sweet wine can be between 30 grams and 200 grams.
To know the specific sugar content, you can check the label on the bottle or consult the product manual, which usually provides detailed information of the wine, including the sugar content. In addition, you can also consult a winery or a professional liquor salesman, who can provide you with more accurate and detailed information.