The logo of Sina Corp.'s Sina Weibo microblog service is displayed on an Apple iPad and iPhone. Photo: Bloomberg

China threatens to shut down Sina unless it 'improves censorship'

The online portal 'distorted news facts, violated morality and engaged in media hype'

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The logo of Sina Corp.'s Sina Weibo microblog service is displayed on an Apple iPad and iPhone. Photo: Bloomberg
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