Wei Liao Zi was written by Wei Liao, a military theorist from the late Warring States Period (475-221BC). In the book there is one sentence mentioning that Emperor Liang Huiwang (whose reign was between 370-319BC) asked Wei Liao questions; thus it is generally believed that Wei Liao, whose whereabouts are largely known, basically lived in that period. Although Wei Liao’s battle and official achievements are hardly found in historical records, he was still a talented military strategist.The military thought expressed in the book represents an important genre of Chinese military thoughts in the Warring States Period, and also is a result and reflection of the political thoughts behind feudalism in East China’s Shandong Province at the time.