How do parents greet the principal in the group?

The headmaster greeted the parents in the group as follows:

1. Use honorifics: You can address the headmaster as "principal" or "teacher" to show your respect and respect for him.

2. Introduce yourself: If you haven't met the headmaster face to face, you can briefly introduce yourself when you say hello, so that the headmaster can better understand your identity and background.

3. Express your happy mood: You can express your happy mood when you say hello, so as to enhance your friendly relationship with the headmaster.