The first thing depends on what grade of dry white wine it is. Red wine is rarely very sweet, and only domestic middle and low-grade red wine is sweet. Some red wines from Australia, Italy and Chile are refreshing, but not completely sweet. On the contrary, some white wines are very sweet, such as French expensive rotten sweet white and so on. Generally speaking, a good dry white wine is not very sour, only has a proper fruit flavor, and should not be bitter and salty. If this is the feeling, it should not be good wine or it should be bad.