The earliest comprehensive work on tea compiled by the Chinese scholar Lu Yu was Ch'a Ching.

The earliest comprehensive work on tea compiled by the Chinese scholar Lu Yu is titled "The Classic of Tea" (Ch'a Ching). It is a treatise on the art of tea and is considered a classic work on the subject. The book is divided into three sections: the first section discusses the history and cultivation of tea, the second section covers the preparation and serving of tea, and the third section deals with the aesthetics of tea and its role in daily life. The "Classic of Tea" has been translated into many languages and is widely regarded as an important work on the cultural and historical significance of tea.