 I often drink tea at home because my dad likes to drink Pu'er tea, especially sheng pu. Sheng pu becomes shou pu after a long time. It's not like sheng pu is fried and then boiled in a pot and becomes shou pu. It's not like that. It's a matter of time. Sheng pu can become shou pu after about 10 to 20 years. Shou pu is for people who are used to drinking sheng pu. They can't get used to any tea. They can still drink it, but they will only find it very difficult to drink.