Without knowing the identity of the other party, address the other party with "Mr." and "Miss" and the other party's surname (such as Miss X and Mr. X).
2? title
Know each other's position, and add your last name before the position, such as manager X and director X.
3? Name and address
Generally used between colleagues at the same level.
If the relationship is good, or the company atmosphere is active and democratic, older colleagues can be called brother X or sister X.
4? professional title
Know each other's occupation, and add surname before occupation, such as X worker, X teacher and X doctor.
5? Wrong name
Address others by nicknames.
Short name of title (for example, Director Fan is called Fan Bureau for short).
Read someone else's last name wrong.
If you don't know the other person's situation, call someone else.
For those who are unfamiliar, just call them Brother X or Sister X.