Yes, the law only stipulates that children can take the father's or mother's surname, but it does not prohibit the use of a surname. However, I personally think it is best to use surnames, because surnames have a history of 5,000 years in China. For a long time, Chinese surnames have been male-based. From a genetic point of view, only males have Y chromosomes. Therefore, Y chromosomes are the same as Surnames are passed down to male offspring together, so people with the same surname also have the same type of Y chromosome and the genes it carries. Many genetic diseases are only spread among people with the same surname, which is very helpful for studying human genetics. At the same time, surnames are also an important symbol of cultural inheritance. No country in the world has inherited surnames as completely and meaningfully as China.