What is your current occupation?
IT
Economic
Freelance
Education
Student
Other
Do you usually use audio function of chat apps?
If you don’t, is there a situation that you have to use it?
If you do, why do you like it?
When do you usually use audio function?
Compare to typewriting, what are the strengths and weaknesses of audio function?
What is the most inconvenient thing of audio function?