What materials is Chang ku made from?

Chang ku, a traditional Chinese fermented beverage, is primarily made from glutinous rice, water, and a fermentation starter known as "qu." The glutinous rice is cooked and then mixed with water and the fermentation starter, which contains naturally occurring yeasts and molds. This mixture is allowed to ferment, resulting in a sweet, slightly alcoholic drink. Depending on regional variations, additional ingredients like fruit or herbs may also be included.