It also said Beijing’s local cyberspace regulator had imposed 44 penalties on Weibo totalling 14.3 million yuan for the year to November.
Weibo said in a statement it “sincerely accepts criticism” from the regulator and has established a work group in response to the penalty.
The fine is the latest in a string of penalties the regulator has imposed on tech companies this year and comes amid tougher oversight of an tightly censored internet that has seen new guidelines issued for news sites and online platforms. Authorities have said they want to promote a “civilised” internet.
Earlier this month, the CAC fined Douban, a popular site for reviewing movies, 1.5 million yuan citing “unlawful release of information”.
($1 = 6.3671 yuan)
(Reporting by Josh Horwitz and Brenda Goh; Editing by Edwina Gibbs)