The word tú 荼 appears in the Shijing and other ancient texts to signify a kind of "bitter vegetable" (苦菜), and it is possible that it referred to a number of different plants such as sowthistle, chicory, or smartweed, In the Chronicles of Huayang, it was recorded that the Ba people in Sichuan presented tu to the Zhou king.The state of Ba and its neighbour Shu were later conquered by the Qin, and according to the 17th century scholar Gu Yanwu who wrote in Ri Zhi Lu (日知錄): "It was after the Qin had taken Shu that they learned how to drink tea." contains the first known reference to boiling tea.It is also believed that in Sichuan, "people began to boil tea leaves for consumption into a concentrated liquid without the addition of other leaves or herbs, thereby using tea as a bitter yet stimulating drink, rather than as a medicinal concoction." although evidence suggests that tea drinking may have been introduced from the southwest of China (Sichuan/Yunnan area).The earliest written records of tea come from China.During the Tang dynasty, tea was steamed, then pounded and shaped into cake form, while in the Song dynasty, loose-leaf tea was developed and became popular.During the Yuan and Ming dynasties, unoxidized tea leaves were first pan-fried, then rolled and dried, a process that stops the oxidation process that turns the leaves dark, thereby allowing tea to remain green.The Cha pronunciation came from the Cantonese chàh of Guangzhou (Canton) and the ports of Hong Kong and Macau, which were also major points of contact, especially with the Portuguese traders who settled Macau in the 16th century.The Portuguese adopted the Cantonese pronunciation "chá", and spread it to India.
It was popularized as a recreational drink during the Chinese Tang dynasty, and tea drinking spread to other East Asian countries.
Why do I, or any other human, get sore and cracked heels?
I understand it's less common in men than women – presumably this is down to footwear choices?
A golf ball has dimples on its surface to increase the efficiency of airflow over it and let it fly further.
Why isn't the skin of aircraft and cars similarly dimpled? Runners have long debated the difference between training on a treadmill and training on solid ground.