Many people believe that tea was first drunk nearly 5,000 years ago. It is said that a Chinese ruler called Shen Nong was the first to discover tea as a drink. More than 4,000 years later, Lu Yu, the saint of tea, mentioned Shen Nong in his book Cha Jing. The book describes how tea plants were grown and used to make tea. It also discusses where the finest tea leaves were produced and what kinds of water were used.It is believed that tea was brought to Korea and Japan during the 6th and 7th centuries. In England, tea didn‘t appear until around 1660, but less than 100 years later, it had become the national drink. The tea trade from China to Western countries took place in the 19th century. This helped to spread the popularity of tea and the tea plant to more places around the world. Even though many people now know about tea culture, the Chinese are without doubt the ones who best understand the nature of tea. It is said that Shen Nong was the first to discover tea as a drink. The book Cha Jing was written by Lu Yu. The tea was brought to Korea and Japan during the 7th and 8th centuries. The tea trade from Western countries to China took place in the 19th century. The Chinese are the ones who best understand the nature of tea.