Dark tea has many varieties, Fu Zhuan 茯砖 (Fu Brick) tea is a special one, the mystery tea of ancient Chinese Silk Road, are made into brick-like forms which are smooth, clean-cut and the same thickness and firmness.
Process includes 28 steps: 6 fermenations —-
1th change leaves color (pile-fermentation),
2th need at least 12 months (cold fermenation),
3th sterilize and disinfect by a high temperature steam,
4th steam pile-fermentation after blending,
5th put in constant-temperature chambers to produce “golen flower” (Eurotium Cristatum). Fahua 发花 [fā huā] the unique procedure is the natural fermentation under the effects of the activities of the microbes, produces many golden yellow granules (Eurotium Cristatum).
6th is post-fermentation.
Denser and larger granules with the bright golden Color are considered to be better, tea soup color should be bright orange with pure fragrance and mellow flavour, rich golden flower Aroma.