hēizhuān

The black brick from Anhua County (安化) — one of the “three bricks” in the canon of sānjiān sānzhuān yī juǎn (三尖三砖一卷), a tightly compressed dark tea that marked the beginning of the modern history of Hunan’s factory brick tea production in 1939. It is rightfully called the “progenitor” (祖) of modern Anhua bricks.

1. Classification and Origin:

• Type: Dark tea (heicha), compressed brick.
• Category: Anhua heicha, one of the “three bricks” (三砖) in the canon of “three pointed, three bricks, one scroll” — sānjiān sānzhuān yī juǎn (三尖三砖一卷).
• Origin: Anhua County (安化), Hunan Province — the historical center of dark tea production.
• Position in the Anhua heicha system: The classical nomenclature fits into the formula “three pointed, three bricks, one scroll.” The “three pointed” (三尖) comprise the loose tiānjiān, gòngjiān, and shēngjiān, packed in woven baskets mièlǒu (篾篓); the “one scroll” (一卷) is the famous pillar qiānliǎng (千两茶) and the entire huājuǎn (花卷) series. The “three bricks” (三砖) are the compressed slabs: Fuzhuan (茯砖) with its golden fungal bloom, Huazhuan (花砖) with its ornamental border, and Heizhuan (黑砖) itself, the black brick.
• Market positioning: A mid-range tea (中档) — a solid, everyday product, lacking the aristocratic delicacy of tiānjiān or the collector’s halo of qiānliǎng, yet possessing its own strict, dense aesthetic. Within this triad, Heizhuan holds a special position: it was precisely with this tea that industrial pressing began.

2. History and Cultural Significance:

The starting point for Heizhuan is 1939, when the Baishaxi Factory (白沙溪) produced the first black brick. This event is considered the birth of modern factory pressing of Anhua dark tea — it is from here that the entire line of “three bricks” grew. Thus, Heizhuan carries the honorary role of “progenitor” (祖) of modern Anhua bricks — a form that enabled the standardization, warehousing, and transportation of Hunan dark tea on an industrial scale.

Unlike the “pointed” series teas, historically associated with the court and nobility (tiānjiān for the aristocracy, gòngjiān as “tribute”), Heizhuan was conceived from the outset as a mass-market, reliable product — dense, easy to transport, and designed for long-term storage. This pragmatic nature made it the foundational pillar of the Anhua brick tradition.

3. Botanical Description and Raw Material:

• Raw Material: Heizhuan is pressed from black maofeng (黑毛茶) — a semi-finished product that has undergone basic processing with moist pile-fermentation.
• Grade: Black brick uses second and third-grade raw material (二-三级黑毛茶) — no longer the most tender apical flushes, but a more mature, robust leaf that yields an infusion with pronounced body and resistance to aging.
• Cultivar: No specific single cultivar is assigned to Heizhuan by sources — the tea is made from local Anhua material characteristic of the entire heicha production region. The decisive factor is not so much the bush variety as the leaf grade and the primary processing technology into black maofeng.

4. Terroir and Cultivation Characteristics:

• Home: Anhua County in Hunan Province, the historical center of dark tea production.
• Conditions: Mountainous terrain, a humid subtropical climate, and distinctive local soils produce raw material with a dense, saturated body that withstands prolonged fermentation and compression well.
• Logistics: The need for a transportable, durable form largely determined the appearance of the local bricks.

5. Production Technology:

• Steam Pressing (蒸压, zhēngyā): The key operation defining Heizhuan’s character. The prepared black maofeng is sorted by grade, steamed to soften and render it pliable, then tightly pressed into a brick form. The result is a very dense, tight slab (紧实): Heizhuan is renowned for its compactness and neat geometry.
• Drying: The finished brick is dried at a moderate temperature — not exceeding 65 °C (干燥 ≤65℃). This is a fundamental point: the gentle heat regime fixes the shape and stabilizes moisture content without “scorching” the tea, preserving its potential for further maturation.
• Difference from Fuzhuan (茯砖): Heizhuan lacks a “blooming” stage (发花) — the “golden fungus” Eurotium cristatum (冠突散囊菌, guāntū sǎnnángjūn) is not cultivated. Where Fuzhuan’s controlled development of golden spores at 25–45 °C and 75–90 % humidity over 15–22 days yields a characteristic “fungal aroma” (菌花香), Heizhuan follows a “clean” path of dense pressing and drying, developing an aged aroma without the involvement of visible mycelium.
• Difference from Huazhuan (花砖): The black brick is distinguished by the absence of decorative ornamentation along the slab’s edge — Heizhuan remains austere and smooth.

6. Organoleptic Characteristics:

The profile of Heizhuan is “aged aroma” (陈香, chénxiāng) and a pure, rectified fullness of taste (醇正, chúnzhèng). The infusion is dense, even, with a dark body; unlike tiānjiān with its pronounced pine smoke (松烟香) and Fuzhuan with its fungal note, Heizhuan relies on its own calm depth of aged dark tea. Over the years, a properly stored brick reveals itself more fully — for all Anhua heicha, the principle “the older, the more aromatic” applies.

9. Brewing:

Since the slab is very tightly pressed, one carefully separates the needed portion using a tea knife for brewing. Dark teas of this type prefer:

• boiling water (close to 100 °C), which opens up the mature raw material;
• a rinse (a quick first infusion to “awaken” and cleanse the dense piece);
• multiple short steepings in a gaiwan or Yixing teapot, gradually lengthened as the leaf opens;
• boiling (煮茶) for the final fragments that have already yielded their primary aroma — a method particularly suitable for a robust, mature brick.

10. Storage:

A properly stored brick reveals itself more fully over the years — for all Anhua heicha, the principle “the older, the more aromatic” applies. The gentle final drying regime (not exceeding 65 °C) preserves the potential for further maturation, and the dense form is designed for long-term storage.

11. Price and Counterfeits:

By market positioning, Heizhuan is a mid-range tea (中档). How to distinguish genuine Heizhuan:

• From Fuzhuan (茯砖): Heizhuan lacks “golden flowers” — when breaking the slab, you will not see golden-yellow specks of Eurotium cristatum and will not sense a fungal aroma. Heizhuan is a pure “aged aroma” without a fungal note.
• From Huazhuan (花砖): Heizhuan is smooth, without ornamentation, whereas Huazhuan bears a decorative pattern along the four edges of the slab.
• From the “pointed” teas (三尖): Heizhuan is a compressed brick, not loose tea in a woven basket; it generally lacks the pronounced pine smoke characteristic of tiānjiān and gòngjiān, which undergo pine-fire roasting.
• By density and shape: Genuine Heizhuan is recognized by its very tight, dense pressing (紧实) and neat slab geometry.
• By raw material: The base is second- to third-grade black maofeng, yielding a mature, strong infusion body, not the “tender-floral” lightness of higher grades.

12. Interesting Facts:

• Standards and grade: Heizhuan belongs to the Anhua dark tea products regulated within China’s national and industry standardization system for dark teas. Key controlled parameters are the grade of the original black maofeng (二-三级), pressing density, drying regime, and characteristics of the finished infusion. Specific numerical indices depend on the current edition of the standard and the grade declared by the producer; reliably documented technological benchmarks are second- to third-grade raw material and final drying at a temperature not exceeding 65 °C.
• Heizhuan is a case where the historical “progenitor” role and a restrained, solid character coincide: a tea without ostentatious additions like golden fungus or ornamentation, yet it is precisely with it that an understanding of what pressed Anhua dark tea truly is begins.