Tea can taste better after several infusions because the leaves gradually hydrate and open, changing extraction and revealing different layers of aroma, flavor, sweetness, texture, and aftertaste.
This is particularly noticeable with Chinese oolong, black tea, white tea, and many pu-erh teas.
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.
