大单小单大双小双口诀

简介：As the prince's eyes and ears, the Military Intelligence Department of the Beijing Camp, although they have withdrawn from the capital, does not mean that they are indifferent to the capital's court. On the contrary, precisely because of their withdrawal, they are more concerned about the dynamics of the capital, especially after the prince leaves the capital. Under the circumstances, they have to keep an eye on every move of the capital.