Mid-term Pu 'er tea. Yunnan Qizi cake tea is made of Pu 'er loose tea and pressed into a round cake shape. Every 7 pieces are packaged as 1 tube, so it is named Qizi cake tea. One of them is made of medium-term old tea, which generally refers to tea with a tea age of 5 to 15 years. Therefore, Zhongpu of Yunnan Zhongpu Qizi cake tea refers to the medium-term Pu 'er tea.