《宋史·列传·卷七十九》
政和初年，蔡襄的孙子蔡佃廷试宣布名次，居于考试首位，蔡京在殿上侍候皇帝，以族孙避嫌，降蔡佃为第二名，蔡佃终身都怨恨他。
政和初，襄孙佃廷试唱名，居举首，京侍殿上，以族孙引嫌，降为第二，佃终身恨之。
In the early years of Zhenghe, Cai Xiang’s grandson Cai TIan tested his marks and was ranked first in the test. Cai Jing was serving the emperor in the hall. In order to avoid suspicion with his grandnephew, he ranked Cai Tian second, which caused him to resent Cai Jing throughout his life.