
Photo: Wikimedia Commons · CC BY-SA 4.0
Thesis
Read through modern tea science, “淮南以光州上义阳郡舒州次寿州下蕲州黄州又下” is not a lab result but a set of variables: cultivar, soil, light and plucking standard.
Text
“In Huainan Circuit, Guangzhou is best, Yiyang and Shuzhou next, Shouzhou lower, and Qizhou and Huangzhou lowest.”
Context
淮南道:今河南南部与安徽一带。光州(今潢川)为上。
Evidence
- Collation: 各本一致。"光州"治今河南潢川,唐代淮南名茶产地。
- Existing readings: 吴觉农指出:淮南道所辖即今豫南皖北茶区,光州(潢川)一带至今仍产信阳毛尖等名茶——陆羽千年前的茶区评定,与今日格局大体相合。
Analysis
Modern tea science would split “淮南以光州上义阳郡舒州次寿州下蕲州黄州又下” into cultivar, soil, light and plucking variables. 吴觉农指出:淮南道所辖即今豫南皖北茶区,光州(潢川)一带至今仍产信阳毛尖等名茶——陆羽千年前的茶区评定,与今日格局大体相合。 They remain testable, but only with their conditions attached.
Conclusion
The section does not give a universal rule. It demonstrates a method: read the text, the annotation and the Tang context together before making a modern claim.
Source: The Classic of Tea, Chapter VIII · The Producing Regions, section 2; the original is in the public domain.
Experience should be explained, not mystified.