The difference between Liu and Li Dao is that "their views are different, but their emphasis is different". Because Liu and Li Daoliu both said the word "Liu", Liu said "Wen" and "Li Daoliu", and Li Daoliu emphasized the side of "Li Daoliu", so the word "Wen" was not mentioned. Although there are different opinions, everyone knows that it is Liu.

Liu is one of the surnames in China, ranking 252nd among hundreds of surnames. In the history of China, Liu was the surname with the largest number of emperors.