My sister and her 6-year old daughter applied for B2 visa yesterday
to visit me at the Guangzhou consulate of U.S and got approved.
We prepare all the documents from my sister's bank statement, employment
verification to house car ownership, salary, notarization of relationship,
etc. But the VO only asked my sister what countries she had visited
in the past. She'd been to some western Europe countries and Japan before.
She's an architect working in a design firm and holding some management
position. The VO didn't ask for anything else and didn't ask
about her daughter before he approved their applications.
Wish this information would be useful for others.