the Book of Family Names, "character primer" and called the three elementary reading. "Of" writing in the early northern song dynasty, the original collection of Chinese surnames 411, after the supplement to 504, including 444 单姓, compound surname 60. "Of" read to smooth, easy easy to remember. "Of" is not in accordance with the name of the population, "zhao QianSun li" has become "of" four last name because of formed in the song dynasty yue qiantang area, so the song dynasty emperor weak, wu yue king lingwai, wu yue king money c.r. is princess sun - style and practice king lee as of the first four bits.