The importance of baijiu (lit. "white liquor") in China (99.5% of its alcoholic market) makes it the most-consumed alcoholic spirit in the world. It dates back to the introduction of distilling during the Song dynasty; can be made from wheat, corn, or rice; and is usually around 120 proof (60% ABV). The most ubiquitous brand is the cheap Er guo tou, but Mao Tai is the premium baijiu. Other popular brands include Kang, Lu Zhou Te Qu, and Wu Liang Ye.