Guides
Oolong Brewing
The standing method for brewing oolong, gongfu and Western, with sourced temperatures, gram ratios, steep times, and infusion counts, and how greener and roasted leaf want different heat.
Oolong and the Clinical Trial
The evidence behind oolong's health claims runs from a 76,979-person cohort to a 20-person industry-run crossover, and the two are not the same kind of proof. The Order's standing method for reading a trial before trusting it: sample size, funding, statistical versus practical significance, and how much a single study should ever be allowed to settle a question.
Oolong and Geographical Indication
A protected name is not a quality grade. What geographical-indication protection actually certifies for Wuyi yancha, Anxi Tieguanyin, and Phoenix Dancong, why Taiwan's oolongs sit outside that system entirely, and why an American shop can sell fake "Tieguanyin" legally, not because no protection exists, but because none of the four names has ever filed for the one the US offers.
Oolong Grades and Cultivars
Oolong carries four different things called a grade: a national sensory tier, a government cultivar registration, a trade aroma-type name, and a competition award. The canonical account of what each one actually certifies, and what it does not.
Oolong and Health
What the published research on oolong tea actually measures, not what the label copy claims. The trial and cohort evidence on the heart, blood sugar, weight, and bone, how partial oxidation changes the chemistry those trials test, and how to read a small positive trial against a large null one.
The History of Oolong
Oolong was not invented once. Two Fujian counties still dispute the original break from green tea, Guangdong's Phoenix mountains claim a separate and older founding legend, Taiwan received the method by migration a century later, and the word "oolong" itself only reached print in the 1850s. The documented record, region by region.
Kill-Green
The heat step that arrests enzymatic oxidation in oolong. What denatures the enzymes and why it cannot be undone, the wok and the drum with their real numbers, how a maker judges it done, the two ways it fails, and the storage defect that only resembles one.
Oolong and the National Standard
A bag of oolong answers to a real government document before it answers to a taster, and the document is not one standard but a system: a mandatory floor, a recommended ceiling, and a technical committee of tea professionals who write both. Here is how China's standard system actually works, and where oolong sits inside it.
Oolong Oxidation and Roast
The two axes that define an oolong. What enzymatic oxidation is and how it is arrested by kill-green, why oolong sits partly oxidized between green and black, and how roasting is a separate step applied afterward.
Oolong Polyphenols
The compound family behind color, astringency, and every published health claim. What catechins, theaflavins, and thearubigins actually are, structurally, and what partial oxidation does to each before the leaf ever reaches a cup.
Oolong Regions and Origins
The canonical geography of oolong across its four classic origins: the Wuyi cliffs and Anxi in Fujian, the Phoenix mountains of Guangdong, and the high mountains of Taiwan, with the terroir, cultivars, and elevations that separate them.
Storage and Aging
Most oolong is made to drink young and does not improve in a drawer. A roasted minority is made, and stored, to be re-roasted every few years and drunk decades later. The Standard on how that works, what changes in the leaf, and how it differs from aging pu-erh.
What Is Oolong Tea
Oolong is partly oxidized Camellia sinensis, made to a chosen point between green and black. This is the canonical account of what it is, how it is made, the major style families, how it tastes across the spectrum, and why it is brewed gongfu.
Yancha, Wuyi Rock Tea
Yancha is the oxidized, charcoal-fired oolong of the Wuyi cliffs, defined by the mineral yan yun and sorted by the state into five official categories. The canonical account of what it is, how it is classified and graded, how it is made, and the documented history from Tang-dynasty tribute leaf to today's regulation.