Pu-erh tea

„Nèi piào (内票): A larger description ticket or flyer packaged loose under the wrapper. Both aid in assuring the identity of the cake. It usually indicates factory and brand. As well, many nèi piào contain a summary of the tea factories' history and any additional laudatory statements concerning the tea, from its taste and rarity, to its ability to cure diseases and effect weight loss.“

„There is also knowledge that you can gain from drinking the same tea over and over again that you cannot from sampling. This may involve the tea changing on you – a traditionally stored puerh gradually losing its storage taste, for example. Or, it can just be that you start noticing nuances that were there, but were not necessarily obvious the first few times you try it.“