Dark
Dark tea (hei cha) is a category of Chinese post-fermented teas that are distinct from puerh despite sharing the post-fermentation step: they use different cultivars, different regions, and different microbial profiles, and they evolved for different trade routes and consumer markets. Hunan's fu zhuan brick, with its distinctive golden-flower mold (Eurotium cristatum), Guangxi's Liu Bao, and the Sichuan compressed teas for the Tibetan trade are the major families. The category also includes Korean post-fermented styles. The shared thread is microbial transformation after initial processing, producing earthy, aged, and in some cases herbaceous or camphor-edged character that is less sharp than young sheng puerh and distinct from ripe puerh.
Families
Hunan & Hubei
The core of Chinese dark tea production. Hunan's Anhua county produces the most celebrated range: Fu Zhuan brick is the signature, distinguished by its golden-flower mold (Eurotium cristatum) that develops during pressing and contributes a distinctive mushroom and honey note; Hei Zhuan, Hua Zhuan, and the loose-leaf Tian Jian round out the range. Hubei's Qing Zhuan comes from Chibi. Shaanxi's Jing Wei Fu Cha is a related golden-flower tradition with its own factory lineage, distinct from Anhua's. These are the teas that built the old border-trade routes to Tibet and Mongolia.
Fu Zhuan, Hei Zhuan (Black Brick), Hua Zhuan (Flower Brick) …
Guangxi & Cantonese
The southern dark-tea family rooted in Cantonese trade and warehouse culture. Liu Bao from Guangxi is stored and aged in baskets, developing a deep earthy, woody, and sometimes camphor or betel-nut character through years of humid warehouse aging. Liu An basket tea originated in Anhui but is historically aged and consumed in Hong Kong and Guangdong, where generations of tea drinkers built the appreciation for its distinctive aged profile. Both styles have deep roots in overseas Cantonese tea culture; they reward collectors willing to engage with aging as part of the experience.
Liu Bao, Liu An Hei Cha (Basket Tea)
Sichuan & Tibet
Compressed dark teas produced specifically for Tibetan plateau and Mongolian markets, shaped by the Tea Horse Road trade that made them a historical staple. Zang Cha and Kang Zhuan are fermented and pressed into dense bricks designed for long transport and preparation as butter tea (Po Cha). The character is robust, earthy, and built for a fat and salt preparation context rather than solo brewing; these are the most utilitarian and historically specific teas in the dark category.
Zang Cha (Tibetan Dark Tea), Kang Zhuan
Korea
Korean post-fermented teas are distinct from both the oxidized balhyocha and hongcha that sit under black, and they are not Chinese-tradition hei cha. Tteokcha is a genuinely fermented pressed tea shaped like a rice cake; Hadong Heukcha comes from wild-harvested leaf in Hadong, Korea's oldest tea region, with a fermented, earthy character that has no close Chinese analogue. These are small-production styles outside the mainstream Korean green tea tradition, interesting to collectors who want to see what post-fermentation looks like without the Chinese process framework.
Tteokcha (Korean Pressed), Hadong Heukcha (Korean Wild Dark)