popular type of Chinese vinegar that is made exclusively from sorghum and other grains. Nowadays in Shanxi province, some traditional vinegar workshops still produce handmade vinegar with a high acidity that is aged for at least five years. Only the vinegars made in Taiyuan and some counties in Jinzhong and aged for at least three years are considered authentic Shanxi mature vinegar according to the latest national standard. A somewhat lighter form of black vinegar, made from rice, is produced in Japan, where it is called kurozu. Rice vinegar is most popular in the cuisines of East and Southeast Asia. It is available in "white" (light yellow), red, and black varieties. The Japanese prefer a light rice vinegar for the preparation of sushi rice and salad dressings. Red rice vinegar traditionally is colored with red yeast rice. Black rice vinegar (made with black glutinous rice) is most popular in China, and it is also widely used in other East Asian countries. White rice vinegar has a mild acidity with a somewhat "flat" and uncomplex flavor. Some varieties of rice vinegar are sweetened or otherwise seasoned with spices or other added flavorings. Spirits The term "spirit vinegar" is sometimes reserved for the stronger variety (5 to 24% acetic acid) made from sugar cane or from chemically produced acetic acid. To be called "spirit vinegar", the product must come from an agricultural source and must be made by "double fermentation". The first fermentation is sugar to alcohol and the second is alcohol to acetic acid. Product made from synthetically produced acetic acid cannot be called "vinegar" in the UK, where the term allowed is "non-brewed condiment". Sherry vinegar is linked to the production of sherry wines of Jerez. Dark mahogany in color, it is made exclusively from the acetic fermentation of wines. It is concentrated and has generous aromas, including a note of wood, ideal for vinaigrettes and flavoring various foods. Wine vinegar is made from red or white wine, and is the most commonly used vinegar in Southern and Central Europe, Cyprus, and Israel. As with wine, the range in quality is considerable. Better-quality wine vinegars are matured in wood for up to two years, and exhibit a complex, mellow flavor. Wine vinegar tends to have a lower acidity than white or cider vinegars. More expensive wine vinegars are made from individual varieties of wine, such as champagne, sherry, or pinot