Hei Zhuan vs Kangzhuan

Hei Zhuan

Hei Zhuan, or Dark Brick, is a dense pressed dark tea from Anhua, Hunan, made from coarser leaves pressed into standardized bricks. The cup is straightforward and grounding: smooth earthy depth, old wood, and a mild natural sweetness with very little bitterness. It was historically produced for trade along the Tea Horse Road, and its compact form made it easy to transport. Brewing is forgiving — rinse, then steep or simmer.

Kangzhuan

Kangzhuan is the heavyweight of dark tea bricks — large, coarse-pressed cakes made for the historical Tibet trade, where tea was boiled with butter and salt. The leaves are mature and the liquor is dark, earthy, and mildly smoky with a sturdy body that stands up to boiling and churning. Drunk plain it is rustic; its purpose was always utility, which is part of its charm for dark-tea explorers.

Hei Zhuan

Water temperature

95–100°C

Leaf to water

5g / 250ml

Steep time

0.5–1 min

Re-steep

5–8 times

Kangzhuan

Water temperature

95–100°C

Leaf to water

6g / 300ml

Steep time

2–4 min

Re-steep

2–4 times

Hei Zhuan

Medium caffeine — roughly 25–50 mg per brewed serving

A moderate, steady lift without an intense spike.

Kangzhuan

Medium caffeine — roughly 20–40 mg per brewed serving

A moderate, steady lift without an intense spike.

Hei Zhuan

China · Hunan (Anhua)

Hei Zhuan is one of the classic Anhua dark tea bricks traded from Hunan into Tibet and Mongolia.

Kangzhuan

China · Hubei / Sichuan border trade

Kangzhuan bricks traveled the tea-horse road into Tibet for centuries; Hubei and Sichuan both produced them for border trade.