"Xiansen" means Mr., which is a homonym of "Mr."
Definition of "Sir":
1, a teacher, such as Teacher Zhou (meaning the same as Teacher Zhou);
2. Honorable titles for intellectuals and adults with certain status;
3. Old refers to someone who keeps accounts or does paperwork, for example, he is a pawnshop.
4. Always refers to people who tell stories, look at faces, calculate divination, and look at feng shui;
5. Another name for a doctor, such as "I am sick to see my husband";
6. Call someone else's husband or the opposite person your husband (such as your husband, my husband, etc.). );
Men after 7.80 can be called Mr., such as Mr. Wang and Mr. Li.