I'd say older than 3yrs. And sheng as opposed to Shu (ripe). The former is pressed and left to age, and the latter is cooked, speeding up the fermentation process, thus mimicking aging.
The two have completely different characteristics and taste differently. I'd say Shu is more forgiving in terms of steeping, but on the other hand is a lot heavier in taste, with more umami (fishy flavor)
I'm thinking about creating feeds and then displaying updates in form of a notification :) Thanks for the link!