Langjiu is one of the most famous Chinese alcohol brands from Erlang Town, Gulin County, Luzhou, Sichuan. For thousands of years, a unique microbial circle has been formed in the Langjiu liquor production base. The finished liquor has more than 400 kinds of microorganisms which can produce more than 110 kinds of aromatic ingredients through a series of complicated processes, which naturally form the unique taste of Langjiu. Besides, the unique wine banks of Langjiu are two natural caves located on the mountain slopes. Storing Langjiu in the caves for a period of time can make the taste better. The longer it is stored, the less harmful substances the wine has, and the more fragrant and healthier the wine is.