China says it wants to open its economy more to the rest of the world, but Beijing keeps a tight grip on technology and access to media. These 11 items are still off limits.
Chinese users are unable to access Snapchat, as well.
Keeping western firms out has given Chinese tech companies ample time to develop their own networks.
It's a protectionist commercial tactic that has paid dividends. Microblogging service Weibo is popular, and various domestic messaging apps have flourished.
Still, these platforms are heavily censored. That has even included blocking money transfers with numbers that refer to sensitive dates, like the crackdown on Tiananmen Square protestors on June 4, 1989.
Related: China censors money transfers on Tiananmen anniversary
A Harvard study estimated that as many as 488 million social media posts are fabricated by the Chinese government each year in an effort to distract attention from sensitive issues.