《新唐书·列传·卷一百二十一》
嗜好饮茶，在顾渚山下开辟了茶园，每年取采集之茶，自己品尝评定茶的等级。
嗜茶，置园顾渚山下，岁取租茶，自判品第。
He loved drinking tea, and he opened a tea garden under Mount Guzhu. Every year, he collected tea leaves and tasted and evaluated the grade of the tea himself.