打招呼 (dǎ zhāo hu): ทักทายผู้อื่นด้วยคำพูดหรือการกระทำ; แจ้งล่วงหน้า

He greets his neighbors every day.

When you meet a friend on the street, greet them warmly.

When meeting for the first time, we should greet politely.

He is used to greeting people with a smile.

If you leave without saying goodbye, it will seem impolite.

He greets his neighbors every morning.

You need to notify the company about this matter first.

When they met, they just nodded without greeting each other.