Sima Rangju (c. 800 BC, dates of birth and death unknown), military strategist of the Qi State 齊國|齐国[Qí​guó] and author of “Methods of Sima” 司馬法|司马法[Sī​mǎ​Fǎ], one of the Seven Military Classics of ancient China 武經七書|武经七书[Wǔ​jīng​Qī​shū]