《三国志·魏书·任苏杜郑仓传》
百姓刚开始担心被判罪，后来生活渐渐富裕，没有不养育孩子的了；所养育的男女，大多都以郑为字。
民初畏罪，后稍丰给，无不举赡；所育男女，多以郑为字。
Initially, the people were worried about being convicted, but later their lives gradually became prosperous, and none did not raise their children. Most of the men and women who were raised took Zheng as their character.