——10: between 2. If it is some wine grapes with higher sugar content, it is recommended to add sugar between 10:1-10:1.5. You can add white sugar, rock sugar, etc., but it needs to be dissolved with grape juice to be decomposed by yeast. Don’t add too much sugar, otherwise it will affect the fermentation time and the clarity of the wine. If you want to drink sweet wine, it is recommended to add sugar when drinking it.