It's not clear from Mair's post if he's teaching undergraduates, graduate students, or both, and Penn's course catalog isn't much help as it looks to have been cross-listed at a variety of levels: https://www.sas.upenn.edu/ealc/pc/term/2016A including CHIN492/EALC222/EALC622

Regardless, please note that of the 9 students, 2 were from China and a third was from Hong Kong.