Pu-erh tea can change dramatically during aging, particularly raw Pu-erh. Over time, its aroma, color, bitterness, astringency, sweetness, texture, and aftertaste may evolve as the tea interacts with its storage environment. However, aging is not a guarantee of improvement: the quality of the original tea and the quality of storage determine whether aging produces desirable results.
If your oolong does not have enough aroma, the most common causes are incorrect water temperature, insufficient leaf, poor water, improper brewing, stale tea, or a mismatch between the tea's style and your expectations.
Oolong is particularly interesting because aroma is one of its defining strengths, yet aroma can disappear quickly when brewing or storage conditions are unfavorable.
You can tell whether Chinese tea is high quality by evaluating leaf material, aroma, appearance, liquor, mouthfeel, aftertaste, brewing performance, origin, and production information together rather than relying on price or appearance alone.
There is no single visual test that can identify excellent tea.
Loose leaf Chinese tea generally provides greater flavor complexity and a more expressive drinking experience than conventional tea bags because whole leaves have more room to expand and release aroma, although high-quality tea bags can still produce excellent results.
