Before the Ming and Qing Dynasties, how did the imperial edict begin?

Before the Ming and Qing Dynasties, there were various beginnings of imperial edicts, but the most widely known "Fengtian Chengyun" began in the Ming Dynasty.

1. Wei and Jin. During the Wei, Jin, Southern and Northern Dynasties, the opening words of imperial edicts often used the eight words "Ying Tian obeys the times, and accepts the Ming's orders" to clarify the emperor's "orthodoxy".

2. Tang Dynasty. In the edicts of the emperors of the Tang Dynasty, the word "menxia" was often used, because imperial edicts were generally reviewed and issued by the Menxia Province at that time. For example, the imperial edict "Su Zong Orders the Crown Prince to Supervise the State System" begins with: "Menxia, ??the people of the world." This..." also begins with words such as "I Shaoying Junming".

Three, Yuan. The highest god of the Mongolian people is Changshengtian, so the opening words of imperial edicts during the Yuan Dynasty are always "In the power of Changshengtian, great blessings will protect and help, the emperor's decree..."

4. Ming Dynasty. The first person to use "Fengtian Chengyun" as the opening sentence of an imperial edict was Zhu Yuanzhang, Taizu of the Ming Dynasty. When Zhu Yuanzhang first became emperor, he liked to use "reference to the Tang and Song Dynasties", but it was more than ten years later that he switched to "Fengtian Chengyun", and then it became fixed.