《明史·志·卷二十九》
明洪武十四年，给事中郑相同请求按照古代礼制行礼，下诏交群臣讨论。
明洪武十四年，给事中郑相同请如古制，诏下群臣议。
In the fourteenth year of Emperor Hongwu, Zheng Tongxiang, a junior official, requested to perform the salutation in accordance with the ancient ritual system, and an imperial edict was issued for the ministers to discuss.