Pu-erh tea

„Nèi fēi (内飞 or 內飛): A small ticket originally stuck on the tea cake but now usually embedded into the cake during pressing. It is usually used as proof, or a possible sign, to the authenticity of the tea. Some higher end pu'er cakes have more than one nèi fēi embedded in the cake. The ticket usually indicates the tea factory and brand.“

„gan cang; 干藏 - dry storage. Referring to tea storage that tends to be dry rather than excessively humid. Storing raw Puer in an excessively dry climate will have a harmful effect on the tea.“