Chinese nuclear envoy Wu Dawei arrives in Pyongyang

The video begins with a simple greeting to the audience.

What is the significance of the phrase 'Hey there' in a conversation?

In what contexts might you use the greeting 'Hey there'?

How does the tone of 'Hey there' differ from more formal greetings?

What emotions or feelings might be conveyed by saying 'Hey there'?

Can 'Hey there' be used in written communication? Provide examples.