The minimum alcohol content required for baijiu (Chinese liquor) to ignite is typically 40% ABV (alcohol by volume) or higher. This is because ethanol, the flammable component in alcoholic beverages, needs sufficient concentration to produce enough vapor for combustion. When the alcohol content is below 40%, the high water content prevents the vapor from reaching the necessary concentration to sustain a flame.
In English, this can be summarized as:
（图片来源网络，侵删）
"Baijiu with an alcohol content of 40% ABV or higher can generally ignite, as the ethanol vapor concentration becomes sufficient to sustain combustion."
Note: Temperature, ignition source, and other environmental factors may also influence flammability.
（图片来源网络，侵删）
