Ninghuafu aged vinegar will be marked as aged for several years. Generally, the longer the marking time, the better the quality. For example, five years is definitely better than three years.

Old vinegar. Vinegar is stored for a long time after it matures. Dark brown, clear liquid, mellow vinegar taste, less precipitation, long storage time, not easy to deteriorate and so on. Shanxi mature vinegar is one of the four famous vinegars in China. Sorghum is the main material. First, a large amount of distiller's yeast was added, then fermented with low-temperature alcohol, then mixed with rice bran and fermented with acetic acid.