Puer Tea Glossary - Zhi Zheng Tea Shop

„nei xiang;内香 - refers to a kind of fragrance that is not 'yang' or obvious. Often not perceived till after the tea has been swallowed. Sometimes also 幽香 - you xiang.“

„Smoothness, Softness and Character of Puer Tea
Puerh tea is a type of post-fermented tea. When stored in the correct environment the tea, over time will change, hence - post-fermented. Due to this, the bitterness and astringency will slowly transform. The flavour will soften, become more mellow, rich, the character will become more rounded and mature.“