In China, the status of tea is equal to that of coffee in western countries. Most people in China like drinking tea. It is beneficial to human health. As we all know, tea not only has a special taste, but also has the functions of cleaning the stomach and moistening the mouth. There are many kinds of tea. Tieguanyin and Pu 'er are common. There are high and low grades of tea. Tea is a profound knowledge in China and even the whole world.