ChouJiu is a version of HuangJiu that is an unfiltered rice wine similar to a Japanese nigori-style wine. It gained popularity in the Tang Dynasty (known to be a time of prosperity with a great emphasis on leisure-time activities, food and wine) with its capitol in today's Xi'an. Many of the wines, especially ChouJiu, were heated in three-legged wine vessels called Jia and, true to form, it is typically served warm today in the local restaurants. It has an earthy, salty, and slightly sweet taste.