''Report on Water for Brewing Tea'' or is tea

monograph A monograph is generally a long-form work on one (usually scholarly) subject, or one aspect of a subject, typically created by a single author or artist (or, sometimes, by two or more authors). Traditionally it is in written form and published a ...

written by the late Tang-era author Zhang Youxin p) in AD814. This book is the earliest monograph wholly devoted to the quality of

water Water is an inorganic compound with the chemical formula . It is a transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance. It is the main constituent of Earth's hydrosphere and the fluids of all known liv ...

for

brewing Brewing is the production of beer by steeping a starch source (commonly cereal grains, the most popular of which is barley) in water and #Fermenting, fermenting the resulting sweet liquid with Yeast#Beer, yeast. It may be done in a brewery ...

tea Tea is an aromatic beverage prepared by pouring hot or boiling water over cured or fresh leaves of '' Camellia sinensis'', an evergreen shrub native to East Asia which probably originated in the borderlands of south-western China and nor ...

. It was compiled alongside several other texts on tea from the same period into the 13th-century ().

Content

The primary content of the work was a pair of lists of water sources and the quality of these sources. Parts included: * A short list of water sources from seven locations, ranked from best to worst: # Nanling on the lower

Yangtze River The Yangtze or Yangzi ( or ) is the longest river in Eurasia and the third-longest in the world. It rises at Jari Hill in the Tanggula Mountains of the Tibetan Plateau and flows including Dam Qu River the longest source of the Yangtze, i ...

# Huishan Spring near

Wuxi Wuxi ( zh, s=无锡, p=Wúxī, ) is a city in southern Jiangsu, China. As of the 2024 census, it had a population of 7,495,000. The city lies in the southern Yangtze delta and borders Lake Tai. Notable landmarks include Lihu Park, the Mt. Lings ...

Jiangsu Jiangsu is a coastal Provinces of the People's Republic of China, province in East China. It is one of the leading provinces in finance, education, technology, and tourism, with its capital in Nanjing. Jiangsu is the List of Chinese administra ...

# Spring at Tiger Hill Temple near

Suzhou Suzhou is a major prefecture-level city in southern Jiangsu province, China. As part of the Yangtze Delta megalopolis, it is a major economic center and focal point of trade and commerce. Founded in 514 BC, Suzhou rapidly grew in size by the ...

in Jiangsu # Spring at Guanyin Temple in Danyang in Jiangsu # Pingshan Spring at

Daming Temple Daming Temple () is a temple located at the middle peak of Shugang Mountain (蜀冈山), Yangzhou, Jiangsu province, China. This temple is known for a famous monk, Jianzhen, who studied the sutras and initiated people into monkhood here in 742 AD ...

Yangzhou Yangzhou is a prefecture-level city in central Jiangsu Province, East China. Sitting on the north bank of the Yangtze, it borders the provincial capital Nanjing to the southwest, Huai'an to the north, Yancheng to the northeast, Taizhou, Jiangsu, ...

in Jiangsu #

Wusong River Suzhou Creek (or Soochow Creek), also called the Wusong (Woosung) River, is a river that passes through the Shanghai city center. It is named after the neighboring city of Suzhou (Soochow), Jiangsu, the predominant settlement in this area prior ...

, now

Suzhou Creek Suzhou Creek (or Soochow Creek), also called the Wusong (Woosung) River, is a river that passes through the Shanghai city center. It is named after the neighboring city of Suzhou (Soochow), Jiangsu, the predominant settlement in this area prior ...

in Jiangsu and

Shanghai Shanghai, Shanghainese: , Standard Chinese pronunciation: is a direct-administered municipality and the most populous urban area in China. The city is located on the Chinese shoreline on the southern estuary of the Yangtze River, with the ...

Huai River The Huai River, formerly romanized as the Hwai, is a major river in East China, about long with a drainage area of . It is located about midway between the Yellow River and Yangtze River, the two longest rivers and largest drainage basins ...

* An anecdote about

Lu Yu Lu Yu (; 733–804) or Lu Ji (陆疾), courtesy name Jici (季疵) was a Chinese tea master and writer. He is respected as the Sage of Tea for his contribution to Chinese tea culture. He is best known for his monumental book ''The Classic of ...

's marvellous ability as water connoisseur. * A longer list of water quality ranking from twenty locations, with water from melting snow placed last.

References

{{Reflist, 30em Chinese tea classic texts 9th-century Chinese books Tang dynasty literature 814 9th century in China