sī​mǎ​fǎ

“Methods of Sima”, also called “Sima Rangju’s Art of War”, one of the Seven Military Classics of ancient China 武經七書|武经七书[Wǔ​jīng​Qī​shū], written by Sima Rangju 司馬穰苴|司马穰苴[Sī​mǎ​Ráng​jū]