Charcoal Roasting

Charcoal roasting (tan bei) is the traditional and most labor-intensive method of roasting oolong tea, practiced primarily for Wuyi yancha (rock tea) and traditional Anxi Tieguanyin. The process uses longan wood charcoal (preferred for its steady, even heat and subtle fruity aroma) or sometimes lychee or olive wood charcoal. Tea is placed in bamboo baskets over a charcoal pit, and the roast master monitors temperature by hand, adjusting the charcoal arrangement and the basket height over periods of 8-24 hours. The slow, radiant heat penetrates the leaf gradually, driving off moisture while developing Maillard reaction products — the same caramelization chemistry responsible for bread crust and coffee roasting. Charcoal-roasted oolongs develop a distinctive depth: layers of caramel, roasted grain, stone fruit, and a mineral backbone that electric-roasted teas cannot fully replicate. The roast master's skill is paramount — each tea responds differently to heat, and the difference between perfectly roasted and over-roasted is a matter of minutes at critical stages. Many modern producers use electric ovens for efficiency, but premium Wuyi producers maintain charcoal roasting as a point of pride and quality distinction.