Security cameras eye the traffic in Chungking Mansions, a 17-story hive of market stalls, restaurants, and cheap lodging where global traders do business. Indians, Nigerians, and Pakistanis all show up, buying made-in-China goods to sell back home. This block of grungy apartments has been called "the Ghetto at the Center of the World" by Gordon Matthews, a professor at the Chinese University of Hong Kong. Matthews says that the phone dealers, curry shops, sex workers, flophouse travelers, asylum seekers, and others from over 130 different nations engage in a myriad of daily micro-exchanges that show real world globalization in action.