The second is the East Factory. In addition to the Royal Guards, there were two other secret service agencies in the Ming Dynasty, namely the East Factory and the West Factory, which were often seen in TV dramas. The founder of Dongchang is the Ming Emperor Judy. Judy has been worried about the instability of the throne since she launched the "Jingnan War" to seize her nephew's throne. On the one hand, rumors of his death appear from time to time. On the other hand, many court ministers were not very supportive of him.
The third is the West Factory. According to records, the West Factory only existed for a short time in history. During the Chenghua period in Ming Xianzong, a mysterious case of "the demon fox came out at night" occurred in Beijing, and then Li Zilong, a demon, used a side door to confuse people and even snared many eunuchs with ulterior motives. The officers of the West Factory are mainly selected from the guards, who choose their own subordinates. In just a few months, the number of personnel in the West Factory is extremely inflated, and its power even exceeds that of the old East Factory.
The fourth is Liumen, which is a very mysterious place. Because Liumen is among the people, among the four major spy organizations, Liumen Zheng has the lowest power. Later, after the appearance of the West Factory, the strength of the East Factory weakened, and then the West Factory was revoked. At this time, the power of the East Factory also weakened, and the Royal Guards became the strongest.