In Japan, whether dating personals or looking for a job, people often hear a questioning: "what do you type?"The "type" refers to blood type.

Japan's largest book publishers east vendor company statistics show that in 2008 top ten best-selling Japan, the books about blood type is 4 books.These four books was published Wen Yishe type series, respectively introduces type, O type, type A and BAB bloodMan is what kind of personality, listed in August last year, after two months a total of more than 5 million copies sold.

As described in the book,

Type A blood,Perfectionists are sensitive, but may be too anxious;

Type B bloodIs the man who is optimist, but selfish and sometimes eccentric;

Type O bloodCurious, generous but stubborn;

AB blood artistic and full of mystery but not easy to control.