Why is Song Renzong called an official in Qing Ping Le?

Before the TV series "Qingpingle" was broadcasted, I found a very interesting place while enjoying the plot, that is, the people inside called Song Renzong "official" instead of "emperor" as I imagined, which was different from my previous cognition. I don't know if it's the fault of the TV series itself. In previous TV dramas, the emperor was always called "the emperor", including TV dramas set in the Song Dynasty, such as the famous Bao Qingtian.

Out of curiosity, I specially looked up some information.

? "Official" is one of the secular appellations for emperors in ancient times. Calling the son of heaven a "butler" began in the Records of the History of Jin and Long: "The butler is hard to call and wants to be rash. Do you obey me? " But as far as I know, the only dynasty that called the son of heaven "official" was the Song Dynasty.

From the late Tang Dynasty to the Five Dynasties and Ten Kingdoms, the dignity of the "emperor" was damaged and the imperial power declined. The power of life and death in the imperial court is completely in the hands of military commanders with military power, but the emperor changes people like a lantern. After Zhao Kuangyin became emperor, most courtiers around him were former brothers. Therefore, he called himself a "housekeeper", not a "son of heaven". Therefore, relatively speaking, the name "official" has a low status.

? The successors of the Song Dynasty after Zhao Kuangyin did not change the title of "housekeeper" to express their willingness to govern the world together with officials. Of course, I think this may also be influenced by ancient etiquette. After all, ancient people like to emphasize the method of ancestors.

? Let's talk about Zhao Zhen in Song Renzong. He was the fourth emperor of the Song Dynasty. During his reign, the economy of the Northern Song Dynasty was prosperous, and the science, technology and culture also developed greatly. Historians summarize the reign period as "the rule of Ren Zongsheng".

In addition, Injong Zhao Zhen is also very accomplished in calligraphy, especially in flying white calligraphy. The royal collection has 100 volumes.

But to tell the truth, the most famous people in Renzong Dynasty are not the emperor, but those officials in Renzong, such as Bao Qingtian and Fan Zhongyan. Sometimes, I really don't know who is honoring the ancestors, Injong or his courtiers.

Therefore, in the TV series "Qingpingle", Song Renzong is called "the housekeeper" because the crew has investigated and studied the history.