In recent days, Na Sam tofu has been shared widely on many online forums about buying, selling, and eating in Hanoi. This has been one of the famous specialties of Na Sam town, Van Lang district, Lang Son province for many years. Because of the special appeal of Na Sam tofu, many housewives in Hanoi have rushed to order it, not afraid to wait a few days to enjoy it, to see how this famous dish tastes compared to other familiar tofu dishes. However, many people after buying it were disappointed because they had a bad experience with Na Sam tofu. They commented that the quality of the tofu was "not as advertised", "not refreshing, only sour", "wasted money".