China has one of the most social media–savvy and active online populations in the world, with more than 800 million internet users. However, because of the Chinese government’s oppressive internet censorship, everything Chinese citizens see is restricted and controlled.

To enforce censorship and promote the Chinese Communist Party’s views, the government employs “tens of thousands of individuals at the national, provincial, and local levels to monitor electronic communications and online content,” according to the State Department’s Human Rights Report. That monitoring includes reviewing personal letters, telephone calls, social media postings and online news and advertising.

What can’t you view or talk about in China? Here are just a few examples of words and phrases that are currently or have been censored by Beijing.