Wuyi oolong tea processing

From Leaf to Fire: Wuyi Oolong Craft

 

Picking

Picking usually begins after the morning mist clears and sunlight reaches the slopes, and continues until early afternoon. Leaves picked too early contain excessive moisture; leaves picked too late become difficult to process.

The usual picking standard is three to four leaves.

Two leaves are considered too tender and reduce yield.
Five or six leaves are already coarse.
Three to four leaves balance quality and quantity.

Pickers avoid taking the yu ye (鱼叶, fish leaf / bract leaf) together with the shoot, as this affects the next flush.

All picking is done by hand. The index finger hooks the shoot while the thumb presses to detach it. Both hands work at the same time so the leaves are placed gently into the basket with minimal damage.

Fresh Leaf Handling

Once detached from the tree, the leaf continues to respire, so ventilation is essential.

Basic handling principles include:

  • placing leaves in ventilated bamboo picking baskets
  • avoiding compression
  • keeping the baskets out of direct sun
  • transporting leaves to the processing house without delay

Fresh leaves are usually delivered every one to two hours in order to prevent heat accumulation and deterioration.

Initial Withering

Once the leaves arrive at the factory they undergo withering, which reduces moisture and initiates enzymatic activity.

Three methods are used.

shai qing (晒青) – Sun Withering

Leaves are spread thinly on bamboo trays and placed on sun-withering racks.

Under clear conditions this step lasts around 8–9 minutes, reducing moisture from roughly 70–80% to about 60%.

The leaves soften slightly, the raw grassy smell decreases, and fragrance begins to develop.

liang qing (凉青) – Indoor Cooling

After sun withering the leaves are moved to cooling racks in a shaded, ventilated area.

Duration depends on weather conditions:

  • about 20 minutes in dry weather
  • about 30–40 minutes in humid conditions

During this stage moisture redistributes within the leaf and withering continues.

hong qing (烘青) – Heated Withering

When sunlight is unavailable or during rain, heat is used to assist withering.

Leaves are spread on bamboo mats while warm air rises from a fire below.

Because this method can introduce smoke influence, sun withering remains preferable whenever possible.

Indoor Withering and Oxidation (Zuo Qing 做青)

After initial withering the leaves are transferred to the qing jian (青间, oxidation room) for further handling.

Wuyi rock tea is a semi-oxidized tea. The desired state is traditionally described as:

four parts red, six parts green

The leaf edges redden while the center remains green.

yao qing (摇青) – Shaking

The central action of zuo qing is yao qing (摇青).

Leaves are shaken in bamboo trays so they roll and collide with each other.

This process:

  • breaks cells along the leaf edge
  • releases leaf juice
  • allows oxidation to occur when the juice meets oxygen

Shaking is usually carried out three to five times.

Between each round the leaves rest, allowing oxidation to continue.

With successive rounds:

the grassy smell fades
floral fragrance becomes clearer
the leaf edge gradually turns red

When aroma is evident and the leaves become soft with visible red edges, the next step begins.

chao qing (炒青) – Pan Firing

chao qing (炒青) stops oxidation.

The pan temperature is typically 140–160°C.

Leaves are placed into the hot wok and turned quickly for about 2–3 minutes.

Once the leaves soften and lose additional moisture, they are removed from the pan.

Rolling

Rolling begins immediately after pan firing.

Leaves are worked by hand on a rou cha li (揉茶枥, bamboo rolling tray), pressing and twisting them into strips.

Wuyi rock tea traditionally follows a two-fire, two-rolling sequence:

first firing
→ first rolling
→ second firing
→ second rolling

This structure tightens the leaf shape and removes additional moisture.

First Roasting

After the second rolling the leaves still contain significant moisture and must be dried.

They are spread on bamboo trays placed over charcoal heat.

This stage:

  • removes additional moisture
  • stabilizes the leaf shape
  • fixes early aroma

At this point the tea becomes mao cha (毛茶, rough tea).

Sorting

Once cooled, the tea is sorted by hand.

Workers remove:

old leaves
stems
broken fragments
foreign material

This step determines the cleanliness and visual quality of the finished tea.

Final Roasting

After sorting the tea undergoes a second charcoal roasting.

The purpose of this stage is to:

reduce moisture further
stabilize the tea
develop the characteristic roasted aroma associated with Wuyi rock tea.

Roasting intensity varies depending on the desired style.

Finished Tea

After the final roasting the tea is allowed to cool and rest.

The finished tea shows the typical characteristics of Wuyi rock tea:

tight twisted leaves
full aroma
leaf bases displaying the familiar pattern of
“green leaves with red edges.”

At this point the processing of Wuyi rock tea is complete.

Complete Processing Sequence

The full sequence of Wuyi rock tea processing can be summarized as:

1 Picking
2 Fresh leaf handling
3 shai qing (晒青) – Sun withering
4 liang qing (凉青) – Cooling
5 hong qing (烘青) – Heated withering (when necessary)
6 Indoor withering
7 yao qing (摇青) – Oxidation
8 chao qing (炒青) – Pan firing
9 First rolling
10 Second firing
11 Second rolling
12 First roasting
13 Sorting
14 Final roasting
15 Packaging tea