Also, Shen Wei looks so young in this particular outfit/hairstyle that it backs up my personal headcanon that one reason for his exquisite suits is to distract people from the fact that he's actually looked the same the whole time, undergrad/grad student/professor...

Yeah, good point! It would make sense to make himself appear older/changed by changing how he dresses. And it makes me wonder how he dressed as an undergrad ...