Ever since ancient times,there has been a saying that the three most delightful moments in one's life come with success in the imperial examination, marriage and the birth of a son. From the Qin (221BC-206BC) to Qing (1644-1911) Dynasties, the feudal system dominated over two thousands years. During this period, the importance of getting married was far more than that a person found his better half. For the male side，it determined the prosperity and even the future fame of their family；while for the female side, it meant that parents lost the chance of seeing their daughter for a long time. Thus to choose an ideal partner was vital for both the individual and the family.