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Thesis
Read through modern tea science, “自采至于封七经目自胡靴至于霜荷八等” is not a lab result but a set of variables: cultivar, soil, light and plucking standard.
Text
“From picking to sealing there are seven processes; from barbarian boots to frosted lotus there are eight grades.”
Context
七经目：从采到封共经七道工序。八等：茶形分八等。
Evidence
- Collation: 各本一致。吴觉农注："七经目"指采、蒸、捣、拍、焙、穿、封七工序；"八等"为下文茶形八品。
- Existing readings: 吴觉农指出：陆羽以"七经目八等"建立唐代饼茶的工艺与品级体系，为后世茶叶分级制度（如宋代"龙团凤饼"分级）奠定基础。
Analysis
Modern tea science would split “自采至于封七经目自胡靴至于霜荷八等” into cultivar, soil, light and plucking variables. 吴觉农指出：陆羽以"七经目八等"建立唐代饼茶的工艺与品级体系，为后世茶叶分级制度（如宋代"龙团凤饼"分级）奠定基础。 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 III · The Making, section 7; the original is in the public domain.
Experience should be explained, not mystified.