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]