What secrets did Zhao Kuangyin leave when he was wearing a yellow robe, which were not solved until the demise of the Northern Song Dynasty?

Zhao Kuangyin is different from other emperors in the history of China. Zhao Kuangyin is the only emperor who won the throne through a coup. Except for Zhao Kuangyin, all other emperors were produced by regime change, and only Zhao Kuangyin became emperor by coup. At that time, Zhao Kuangyin was only the right-hand man under Chai Rong, the monarch of the Zhou Dynasty, and Chai Rong attached great importance to Zhao Kuangyin. However, Chai Rong's time as a monarch was too short, and he died after only ten years in office. At that time, Zhao Kuangyin staged a coup in Chen Qiaoyi because Zhao Kuangyin had a brother-in-law who was Zhao Kuangyin's superior, but this man was very incompetent. It is said that his brother-in-law was a very cruel man.

And this brother-in-law wants to usurp power as emperor, because this brother-in-law holds very heavy military power. So when Zhao Kuangyin was in Chen Qiaoyi, he learned the methods of Bobby Chen and Guangwu, which was like stuffing a piece of paper in the stomach of a fish. This probably means that the real dragon emperor will fall from the sky, and this person is Zhao Kuangyin. If someone does not obey, he will be punished by God. At that time, people were superstitious, and of course they would believe it when they saw such a thing. After that, Zhao Kuangyin reluctantly put on the dragon robe.

Then he brought his brother-in-law to justice and proclaimed himself emperor in Chen Qiaoyi, that is, the Song Dynasty. At that time, because his former monarch Chai Rong was very kind to him, when Zhao Kuangyin became emperor, he was very kind to Chai Rong and his son and didn't kill them. Moreover, he vowed not to kill Chai's descendants in the future, but to protect Chai's descendants. So it can be seen that Zhao Kuangyin is a very kind monarch. In addition to not killing the descendants of Chai, it is also stipulated that no scholar-officials can be killed, so the Song Dynasty did not kill a scholar-official for hundreds of years. The emperors after the Song Dynasty obeyed this rule of Zhao Kuangyin.

Even if those literati broke the law, the laws and regulations of the Song Dynasty were at best exile and never beheaded. Therefore, this provision of Zhao Kuangyin also allowed the development of cultural leisure in the Song Dynasty. This is also the secret of Zhao Kuangyin wearing a yellow robe.