What are the three volumes written by Lu Yu who lives in seclusion in Tiaoxi?

Lu Yu lived in Tiaoxi in seclusion and wrote the Three-volume Book of Tea, which is the first book on tea studies in ancient China written by Lu Yu in the Tang Dynasty and the first book devoted to tea in the world. It is divided into three volumes with more than 7,000 words, which has a great influence on tea art in later generations.

The Book of Tea is divided into ten categories, namely, the source of one, the device of two, the creation of three, the device of four, the cooking of five, the drink of six, the seven things, the eight things, the nine strategies and the picture of ten.

In 760 AD, in the early years of Shang Yuan in the Tang Dynasty, Lu Yu lived in Tiaoxi in seclusion and wrote three volumes of Tea Classic, which is the earliest, most complete and comprehensive monograph on tea in China and even in the world. It is called the encyclopedia of tea, written by Lu Yu in the Tang Dynasty.