A Twitter executive says the site is working on a way to allow Chinese users to sign up in their own language, though the website remains blocked there.
Twitter co-founder Jack Dorsey said at a panel on Monday that his company is "hard at work" on finding a way to allow users to register in Mandarin.
Dorsey was responding to a question from Chinese avant-garde artist Ai Weiwei, an outspoken critic of Chinese authorities and their censorship.
Dorsey, Ai and Richard MacManus, founder of technology blog ReadWriteWeb, were part of a discussion on digital activism at the Paley Center for Media. The conversation came days after it was reported that Google is likely to close its search engine in China.