Dressed as a Mentally Retarded Emperor, I Pretended to Be Crazy and Acted Like a Fool to Save the Southern Song Dynasty

Oh! Traveled through time, Dressed as Zhao Yu, the last adult emperor of the Southern Song Dynasty who favored thirty concubines in one night and left a name in history. There is a traitor named Jia Sidao who is as famous as Wei Zhongxian next door. Outside, there are the strongest Mongolian cavalry on the face of the earth. What's even worse is that this emperor is still mentally retarded! I originally wanted to lie down and live a happy life that I could not even imagine in my previous life. But he accidentally pretended to be crazy and acted stupid to extend the Southern Song Dynasty's life for a hundred years!