the great firewall, to see what's happening in this very moment. >> reporter: but that's exactly what authorities want to prevent. here's what happens if you search for information aboutgy of the protests on chinese social media. you get a notice that says, sorry, no relevant results are found. meanwhile, on li's twitter account he was rapidly uploading videos of demonstrations across china to shanghai where protesters chanted for xi jinping to step down, calling for freedom and an end to zero covid. and researchers say the chinese government is even trying to bury information about the protests from social media users abroad. search on twitter and chinese characters for cities that had protests and you get this, a flood of spam and porn advertisements. the spam campaign, researchers say, appears to be the work of chinese authorities. twitter did not respond to a request for comment. are you worried about your own