It's the most sensitive day of the year for China's internet, the anniversary of the bloody June 4 crackdown on pro-democracy protests at Tiananmen Square, and with under two weeks to go, China's robot censors are working overtime.

Censors at Chinese internet companies said tools to detect and block content related to the 1989 crackdown have reached unprecedented levels of accuracy, aided by machine learning and voice and image recognition.

"We sometimes say that the artificial intelligence is a scalpel, and a human is a machete," one content screening employee at Beijing Bytedance said, who asked not to be identified because they are not authorised to speak to media.

Two employees at the firm said censorship of the Tiananmen crackdown, along with other highly sensitive issues including Taiwan and Tibet, is now largely automated.

Posts that allude to dates, images and names associated with the protests are automatically rejected.

Read More...