The general structure of English names is: Christian name, self name and surname. Like william jefferson clinton. But on many occasions, middle names are often omitted, such as George Bush, and many people prefer to use nicknames rather than formal Christian names, such as Bill Clinton.
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Etiquette of addressing others abroad:
1. Who do you know?
For people you already know, Mr., Ms. or Mrs. is usually used before the surname, such as Mr. Chang, Ms. Qing, Mrs. Huang, etc. Never use a first name instead of a last name. ?
Second, important people:
For important people, it is best to add their own titles, such as principal, ambassador, senator, professor, etc. To show respect. ?
Third, people you don't know:
You can call it sir and madam. Many people in China call foreigners "Sir". This is not right. It only applies to people who look obviously old, or people who don't know their names but are obviously important.