

M, F, or Tourist Visa? Please help ASAP!
Hi, I'm a student going to China for an internship for 10 weeks. It's partly educational since part of it is cultural immersion and research, but business in the since that I'll be interning at an actual business. The invite letter states that I'll be helping on a company project in research. Should I apply for an M or F type? I also think one of my coworkers got denied an application for an F visa with the same letter however.
I'm planning on flying on June 1 and already booked tickets - I tried applying for a tourist type since it seemed easier but I don't have a hotel reservation under my name. It's under one of the manager's names at the company I'll be interning at - would that be okay? I also need help asap since the next open date for the embassy will be on 5/26... Please help!
Thanks in advance.