Pu-erh tea

„The leaves are then dry pan-fried using a large wok in a process called "kill green" (殺青; pinyin: shā qīng), which arrests most enzyme activity in the leaf and prevents full oxidation. After pan-frying, the leaves are rolled, rubbed, and shaped into strands through several steps to lightly bruise the tea and then left to dry in the sun.“

„The Appearance of Tea
The appearance of dry tea leaves is affected by the form, be it loose, cake, brick, bowl and so on, how much sunlight the leaves have absorbed, the production methods, etc.

If the leaves appear dried out, lifeless or impoverished in some way it is an indicator that there has been a problem with the production or storage of the tea.

Also, picking over the leaves, they should look plump, fertile, with an appearance of abundance. The tips should be delicate with distinct hairs on the leaves and a uniformity to the overall appearance. “