US and Chinese Defence ministers hold talks

The video introduces the concept of 'Boo Boo' and poses the question 'Who?' to engage viewers.

What do you think the phrase 'Boo Boo' signifies in this context?

What emotions or reactions could be associated with the phrase 'Boo Boo'?

What can be inferred about the relationship between the speakers based on their dialogue?

How might the response 'Who?' change the meaning of the previous statement?

In what situations might someone say 'Who?' in response to 'Boo Boo'?