Shang Yang (, 390–338 BCE, born Wei Yang in the State of Wei) was an important, Chinese statesman of the State of Qin during the Warring States period who contributed to what would be termed Chinese Legalism, as detailed in the ''The Book of Lord Shang''. With the support of Duke Xiao of Qin, Yang enacted numerous reforms, transforming the peripheral Qin state into a militarily powerful and strongly centralized kingdom, enhancing the administration through an emphasis on meritocracy.
The vast majority of Yang's reforms were taken from policies instituted elsewhere, such as from Wu Qi of the State of Chu; however, Shang's reforms were more thorough and extreme than those of other states. Under Shang's tenure, Qin quickly caught up with and surpassed the reforms of other states.
After Duke Xiao of Qin ascended the Qin throne, Shang Yang left his lowly position in Wei (to whose ruling family he had been born, but had yet to obtain a high position in〔pg 79 of ''Classical China''〕) to become the chief adviser in Qin at Duke Xiao's behest. There his changes to the state's legal system (which were said to have built upon Li Kui's ''Canon of Laws'') propelled the Qin to prosperity. His policies built the foundation that enabled Qin to conquer all of China, uniting the country for the first time and ushering in the Qin dynasty.
He is credited by Han Fei with the creation of two theories;
#"fixing the standards" ()
#"treating the people as one" ()
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』