Compared with tea, tea brick has many advantages. Brick tea can be boiled and drunk. As 100% post-fermented tea, all the nutrients of brick tea can be displayed at the high temperature of 100℃. The so-called one-boiling bacteria, two-boiling tea, three-boiling and four-boiling are the essence; At the same time, brick tea has no shelf life. The older the better, the more fragrant. It not only tastes good, but also has good health care value. Therefore, brick tea is also called "drinkable antique", which has many advantages and can be preserved for a long time. The shelf life of tea brick is generally 10~20 years. Tea brick is a kind of black tea or white tea, which adopts a unique pressing process and has a unique brick shape. Brick tea has good conditions for long-term storage because of its unique technology and rich internal materials. Generally speaking, if properly preserved, it can be preserved for 10~20 years. Generally speaking, the shelf life of brick tea, thousand-eared tea and poria tea in black tea is 10- 15 years. The shelf life of loose tea such as Sanjian tea and Liubao tea is 5- 10 years. Secondly, some well-preserved Fu tea and brick tea are also suitable for long-term preservation, but they should be clean, dry, odorless and pollution-free. Brick tea is generally stored from 10 to 15. Brick tea, also called autoclaved tea, is a kind of tea that looks like a brick. It is also a representative pressed tea, made of tea leaves, tea stems, and sometimes tea powder is added. Brick tea can be divided into green brick tea, rice brick tea, black brick tea, flower brick tea, Fuzhuan brick tea, Kangzhuan tea and so on according to different raw materials and production techniques. All brick teas are autoclaved, but the molding methods are different. For example, green brick tea, rice brick tea, black brick tea, flower brick tea and Fuzhuan brick tea are all pressed by machinery, while Kang brick tea is hammered out with a stick.