This document discusses internet censorship in China. It begins by posing research questions about China's control over the web and blocked content. It then provides historical background on China's connection to the global internet from 1987-2012. It describes what content is forbidden by law and China's controlling and monitoring structure. Specifically, it notes China blocks politically sensitive terms, news events, sites about activism and religion, and pornography. It concludes China has the most powerful online censorship system worldwide and imprisons netizens, though some find ways to express themselves through homophonic words.