Around 760 to 780, a writer named Lu Yu 陆羽 wrote the Cha Jing 茶经, the Classic of Tea. It was the first book dedicated wholly to tea.
The book is short: three small volumes in ten chapters. It describes the tea plant and where it grows, how leaves were picked and pressed into cakes, and the tools for fire and water. It even ranks water. Mountain springs come first, then river water, then well water.
Much of Lu Yu’s life comes to us through later tellings. Tradition says he was an orphan raised in a Buddhist monastery in Hubei, a province in central China. Later writers added more wonders to his story. The book itself has survived, and it is the part of his story we can trust.
After Lu Yu, tea came with standards: which water, how hot, which bowl. Chinese tea writing has started from his book ever since.