China Steps Up Censorship of Social Media Sites
China is cracking down on internet freedom.

Chinese officials are stepping up efforts to censor the content being shared on social media sites, investigating top networks like Weibo Corp. (WB) , Baidu Inc. (BIDU) and Tencent Holding Group Inc.'s (TCEHY) WeChat, Reuters reported Friday. 

President Xi Jinping has made cyber sovereignty a key plank of his administration's agenda. 

"Users are spreading violence, terror, false rumors, pornography and other hazards to national security, public safety, social order," China's Cyberspace Administration said in a statement. 

Western social networks like Facebook Inc. (FB) and Twitter Inc. (TWTR) are already banned in China. 

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