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.“

„Yu Shui Cha; 雨水茶. Literally Rain water tea. Summer Tea. Less prized than Spring Tea or Autumn Tea. The flavour is usually less fulsome than Spring tea. Also, it is often oven-dried (hong qing; 烘青) as it is harvested in the rainy season.“