A crack in China’s firewall allowed dissident artist Ai Wei Wei to use a Twitter-like social media account for a short time on Sunday, before it shortly became inaccessible. The dissident artist was able to use micro-blogging platform Sina Weibo after discovering that his name was no longer blocked. Ai said his account was deleted shortly after midnight on Monday, and was replaced with a message that read: “Error. Invalid Weibo user”. During the short time the artist’s account was active, he attracted over 10,000 followers. New regulations which require Beijing-based microbloggers to declare their real names went into effect on Friday.