“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[Wu3 jing1 Qi1 shu1], written by Sima Rangju 司馬穰苴|司马穰苴[Si1 ma3 Rang2 ju1]
Sima Rangju (c. 800 BC, dates of birth and death unknown), military strategist of the Qi State 齊國|齐国[Qi2 guo2] and author of “Methods of Sima” 司馬法|司马法[Si1 ma3 Fa3], one of the Seven Military Classics of ancient China 武經七書|武经七书[Wu3 jing1 Qi1 shu1]