In a glass tower in a trendy part of China's eastern city of Tianjin, hundreds of young men and women sit in front of computer screens, scouring the internet for videos and messages that run counter to Communist Party doctrine.
References to President Xi Jinping are scrutinized. As are funny nicknames for state leaders. And any mention of the Tiananmen protests in 1989 is immediately excised, as is sexual innuendo and violent content.
Welcome to China's new world of online censorship, where Orwell's "Nineteen Eighty-Four" meets Silicon Valley startup.