I am a Chinese national that studied at a US university before and am currently working in India as a postdoctoral researcher. Last year I applied for a B1/B2 visa to attend a conference in the US. I got the visa eventually, but only after the conference.
My question is: can I use the visa (which is multi-entry and has no annotation) for an academic visit? Specifically, I plan to visit my former Ph.D. advisor at a US university for one week but wonder if my visa can be used for this purpose and if there are any restrictions. Thank you.