Zhu Yuanzhang set up a Royal Guards to collect information and deal with princes and ministers who committed crimes for him. At that time, Royal Guards had a strong influence in North Korea, and there was no organization such as East Factory and West Factory to compete with it, so it was a monopoly. Later, with the establishment of the East Factory, the influence of Royal Guards gradually declined, even being crushed by the East Factory. During the Jiajing period, the power of Royal Guards began to rise again, even competing with the East Factory. The strength of the Royal Guards benefits from one person, that is, Lu Bing.
Lu Bing's mother is a wet nurse, and Lu Bing's grandfather is a soldier of the Royal Guards. His father inherited his grandfather's office, and later he inherited his father's office in the Royal Guards. Because of Lu Bing's mother, Lu Bing knew Emperor Jiajing from an early age. One day, Emperor Jiajing's palace caught fire. Emperor Jiajing's entourage didn't even know which room Jiajing lived in. It was Liu Bing who saved Emperor Jiajing. After that, the emperor's trust in the savior was rewarded, and finally Lu Bing actually achieved the position of commander-in-chief of the Royal Guards.
After Liu Bing came to power, he was loyal to Emperor Jiajing, devoted himself to providing information for the emperor, and did some inconvenient things for him when necessary. With the advantage of being bold and cautious, Liu Bing firmly grasped the power in his hand. At that time, due to the appreciation of Emperor Jiajing, people in the East Factory dared not fight with Royal Guards. During Lu Bing's tenure as the commander-in-chief of the Royal Guards, the power and status of the Royal Guards changed from a declining trend to a strong one, and then the institution of the Royal Guards stepped down from the altar again and never recovered.