The next AoIR 2015 session I'm in has only two papers, as one speaker has dropped out at the last minute; the first speaker therefore is Fan Mai, whose focus is on the use of Virtual Private Networks and anonymising proxy servers in China. Some such servers are used especially by expatriates living in China, trying to access western media sites that are otherwise blocked.
Such blocking is part of the Chinese censorship regime, of course, and a range of approaches to circumvention are rife in the country. There are very little hard data on the use of such tools …