In the fifty-odd years following the Tang Dynasty of our country, dynastic changes occurred as swiftly as flipping pancakes, a speed unmatched by any other era in history, a period known as the "Five Dynasties and Ten Kingdoms."
Now, in the summer of 959 AD, the sixth year of Xiande in the Later Zhou Dynasty, Emperor Shizong of Zhou, Chai Rong, died young at the age of only 39. Thus, the throne passed to his son, Chai Zongxun. At just seven years old, Chai Zongxun was still a child who understood nothing, which sparked envy in many.
Emperor Shizong had originally been a man of courage, foresight, and strategic vision. He not only conducted campaigns near and far, expanding the empire's territory, but also worked to weaken the military power of regional governors while strengthening the imperial guards—reducing the strength of forces stationed outside the capital while greatly enhancing the central army responsible for defending the capital and the emperor. This was a lesson learned from the Tang Dynasty, when regional military governors (jiedushi) had grown too powerful while the central army remained weak. During the time before Emperor Shizong's death, the highest commander of the imperial guards was the Commander-in-Chief of the Palace Guard (Dianqian Du Dianjian), a position then held by Zhang Yongde. At that time, a rumor circulated in Bianjing (Kaifeng): "The Commander-in-Chief will become the Son of Heaven." This meant that the person holding the position of Commander-in-Chief would become emperor. Although Emperor Shizong could find no evidence of rebellion from Zhang Yongde, he still felt uneasy. He found an excuse to dismiss Zhang Yongde and instead appointed Zhao Kuangyin as the new commander of the imperial guards.