Puer Tea Glossary - Zhi Zheng Tea Shop

„hui gan; 回甜 - Hui 回- return, come back, reply. 甜, gan-sweet. Together - sweet return, sweet aftertaste. Used generally to refer to the aftertaste of tea, be it sweet or not.“

„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.“