(177–217), courtesy name Zhongxuan, was a politician, scholar and poet who lived in the late Eastern Han Dynasty
. He contributed greatly to the establishment of laws and standards during the founding days of the vassal kingdom of Wei – the forerunner of the state of Cao Wei in the Three Kingdoms period – under Cao Cao. For his literary achievements, Wang Can was ranked among the Seven Scholars of Jian'an (建安七子).
Wang Can was also renowned for his eidetic memory. Chen Shou's Records of the Three Kingdoms described an incident where Wang Can was watching a game of weiqi. Someone accidentally knocked into the board and scattered the pieces. Wang Can then placed the pieces back to their original positions based on memory.
More Detail: http://en.wikipedia.org/wiki/Wang_Can