The first half of this sentence shows that there are too many people named Liu and surname, and even a surname may not come down in one continuous line, because there are too many side names, and the relationship here is very chaotic, which can be said to be complicated.
The second half of this sentence is that there are no mistresses in the world, which means that because their surnames are few and there are not many other surnames, it is said that all people surnamed Fang in the world are family members, all of whom are the same ancestor and are more or less related by blood. After all, compared with the previous surname, there are very few people with Fang's surname now, only about one tenth of the previous surname.
Do you know who Fang's ancestors were? In fact, this surname is well-known. Their ancestor was a very famous person, that is, Emperor Yao. According to Chinese historical records, when abdicating, he succeeded to the throne, and after he succeeded to the throne, he named his son Fang. Shun Di's grandson's name is Fang Ling.
From then on, Fang's surname appeared and was passed down from generation to generation. Thousands of years have passed, and Fang's surname still exists. It can be seen from this story that Fang's surname is great, and his descendants are more orthodox and will not be passed on to people who are not related by blood. This has been the case since Shun Di, so the phrase "There are no mistresses in the world" is a portrayal of real events.
China Hundred Family Names is really a great book. People in each period will renovate it, no different from the previous ones, and record the surname status at that time. According to the records in Hundred Surnames, the number of surnames is slowly decreasing, which was not much, but now it is even less.
There are very few people surnamed Fang. Now there is a great man named Fang, that is, our Jackie Chan. His real name is Fang, and later he entered the entertainment circle and changed his name to Jackie Chan. Now he is a big shot in the film circle. I believe that no one can fail to know him. As long as he speaks, no one dares not to listen. His son's name is Fang Zuming, which is also very good. We can know their original surnames from his name.