1. Pit pool: Pit pool is a mud pit, and pit mud contains artificially cultivated pit mud rich in caproic acid bacteria. Pit mud culture can go to Baidu Library to check the composition and culture process.

Second, brewing technology, there are two main kinds of Luzhou-flavor brewing technology, namely Laowu retort technology, Sichuan distiller's grains pits and distiller's grains pits are fermented separately. Only when the proportion of fermented grains is 1:3~5, and the proportion of grain and rice husk is 1:0.25~0.3, can we make wine by mixed steaming and burning. Pay attention to the viscosity of fermented grains in the process of batching, so as to be soft but not sticky. The water in into the pit depends on groundwater and pit construction. Sichuan is rich in groundwater, with into the pit's water volume being about 54%, while the north is less, and into the pit's water volume is about 58%. In terms of details, it is still necessary to find on-site guidance from the master, so that the wine yield and quality can be guaranteed.