The shops outside campus. The blue store to the right sells cell phone recharge cards, the one to the left sells stationary (like the required character box paper), and the place with the Coke sign sells the ubiquitous cheap ice cream found everywhere in Beijing. You can get ethernet cable at either the blue store to the left or the adjacent place. Get a 7 "mi" (meter) cord, which costs a kuai (yuan) a meter.
EAP China! Robert Klein