Pu-erh tea

„Pu-erh is typically made through the following steps:
1. green/raw 青普: sun fixation 曬青 > rolling 揉捻 > sun drying 曬乾:
2. dark/ripe 熟普: sun fixation 曬青 > rolling 揉捻 > Wo Dui (piling) 渥堆 > sun drying 曬乾:
3. added processes: green and dark pu'er can be compressed/shaped into cakes and aged.“

„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.“