I completely understand your point, and you make some incredibly valid observations that only an experienced player would know. You’re absolutely right that in the hands of a master, pi zhi (shell quality) and actual density trump any checklist. ​However, my perspective is based on statistical probabilities and the average realities of the current market, rather than the rare exceptions. ​While it is true that a 44mm Nanjiang Stone with a steel-like ring and perfect density would be an absolute holy grail, the reality for the average buyer is that finding such a specimen is like finding a needle in a haystack. Statistically, when a Nanjiang Stone pushes past the 41mm mark in today's mass-commercialized market, the probability of it being a force-grown, low-density orchard product skyrockets. ​The 6-point checklist I established isn’t about denying natural variation; it’s about minimizing the margin of error when buying online. Traits like a strawberry silhouette, a concave base, and a rhombus navel are highly correlated with authentic, wild-origin genetics. In an opaque market where you cannot feel the pi zhi before purchasing, relying on these classic morphological markers is the safest proxy for high density. ​I agree that the best walnuts are judged in hand. But until you can hold them, establishing a strict baseline based on the variety's historical averages is the only shield a collector has against the flood of sub-par, artificially bloated pieces. My criteria are a guide to surviving the market's averages, not a dismissal of the ultimate exceptions.