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.“

„shai qing; 晒青 - Sun dried. This is a critical aspect of Puer Tea processing. Oven dried tea is considered inferior to sun-dried. The Provincial Government has ruled that Puer tea must be sun-dried.“