Report on Water for Brewing Tea (煎茶水记) is a tea monograph by late Tang dynasty era author Zhang Youxin (张又新) from 814. This book is the earliest monograph wholly devoted to the quality of water for brewing tea.
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- A short list of water sources from seven locations, ranked from 1 to 7:
- Nanling of Yangtze river.
- Wuxi Hui Mountain Temple Spring
- Suzhou Tiger Hill Temple Spring
- Danyang Guanyin Temple
- Yangzhou Da Ming temple
- Wuzhong River
- Huai River
- Temple of Small gods fountain.
- An anecdote about Lu Yu's marvellous ability as water connoisseur.
- A longer list of water quality ranking from twenty locations.