《韩非子·外储说左上》
另一种说法：子产担任郑相，郑简公对子产说： 喝起酒来都没法尽兴。
一曰：子产相郑，简公谓子产曰： 饮酒不乐也。
According to another account: Chan served as prime minister of Zheng, and Duke Jian of Zheng said to Chan: Even when drinking I cannot find full enjoyment.