Shanxi Qingxu specialty aged vinegar is one of the four famous vinegars in China, and its main producing areas are Mengfeng, Qingyuan, Xugou, Xigu and other towns in Qingxu County. Qingxu is located in the south of Taiyuan City, facing the mountain and facing the river. According to legend, "there is Yuquan in the southwest of Yaodi City, and Yaowang personally went to brew acyl".

qingxu mature vinegar is dark brown, with a clear and attractive figure. In addition to the three advantages of acid and alcohol, strong taste and long taste, it also has the characteristics of fragrance, cotton, non-precipitation and "hanging bowls". As long as the bottle cap is unscrewed, the fragrant and sour smell immediately wafts to the nose, drops into the bowl and makes a circle, then sticks to the edge of the bowl evenly. Taste a bite, although the acidity of mature vinegar is five degrees, but I don't feel bitter, but I feel "sweet and fragrant", sour slowly, for a long time, delicious, sour and sweet, fluffy and fragrant; I was satisfied with the acid, but I didn't know enough. I tasted it and wanted to taste it. In addition, if the general vinegar is stored for a long time, it will become turbid, white-skinned, and even corrupt. But the longer qingxu mature vinegar is stored, the more fragrant and sour it becomes. Some people have stored it for decades, and because the bottle cap is not tight, the water evaporates, and the old vinegar becomes solid vinegar like heavy amber, which is still fresh and sour after being washed away with boiling water.