IF YOU ARE from China, you probably know more about baijiu than I do. But if you are not from China, the odds are high that even I, with my admittedly cursory knowledge gleaned from the kind of high-level research booze writers do (Googling and drinking), still probably know more about baijiu than you. Because, despite being apparently the world’s best-selling liquor (some sources say 4 billion liters are consumed a year), baijiu is not widely known outside the borders of a single country…