I am a Chinese national who studied at an American university before and currently works in India as a postdoctoral researcher. Last year, I applied for a B1 / B2 visa to attend a conference in the United States. I finally got the visa, but only after the conference.
My question is: can I use the visa (multi-entry and without annotation) for an academic visit? Specifically, I plan to visit my former PhD counselor at an American university for a week, but I wonder if my visa can be used for this purpose and if there are restrictions. Thank you.