My parents got their visa in Beijing today.
Q: What's the purpose to go to the US?
A: We want to take a look of the US and my daughter when our health is still good after our retirement.
Q: How many children do you have?
A: Two. My son is in Beijing(showed the visa officer my brother's badge. He works for an American company in Beijing).
Q: Any other relatives in China?
A: My mother, she is 97 years old. My brothers and sisters. My grandson and daughter-in-law.
Q: What is your daughter doing there?
A: She is a ------ in ------company.
Q: Dose she have any child?
A: No.
My parents said the interview took less than 2 minutes. Hope this will help. Good luck!