Wo Dui

Wo dui was developed at the Kunming Tea Factory in 1973 to replicate the complex, smooth character of naturally aged sheng pu-erh within weeks rather than decades. In this process, sun-dried maocha is piled to a depth of roughly one meter, moistened to 25-30% humidity, and covered with thermal blankets. Internal temperatures reach 50-65 degrees Celsius as Aspergillus niger, various Bacillus species, and yeasts colonize the leaf mass, breaking down catechins, creating new aromatic compounds, and darkening the leaves from green to deep brown-black. Workers periodically turn the pile to prevent overheating and ensure even fermentation. The process demands careful monitoring — excessive heat or moisture can produce off-flavors described as fishy, muddy, or compost-like. Well-executed wo dui produces a clean, smooth, earthy pu-erh with notes of dark chocolate, mushroom, and damp forest floor.