《太平广记·卷一百八十六·铨选二》
后人把郑余庆比做汉和帝时的鲁恭。刘禹锡又说，陈讽、张复元各授京畿县的职官。他俩请求换个县，郑答应了。
又云：陈讽、张复元各注畿县，请换县，允之。
Later generations compared Zheng Yuqing to Lu Gong during the reign of Emperor He of the Han. Liu Yuxi also said that both Chen Song and Zhang Fuyuan received appointments to be magistrates of counties in the capital region. They both requested transfers to other counties and Zheng approved.