Western internet companies have struggled to make in-roads in China, the country with, as well as the world's biggest population, the world's biggest online population, with 340m users.
Ebay, the online auction website, was trumped by local rival Taobao; Yahoo has became somewhat obsolete in the Chinese search market, and Google is struggling to gain even half the market share of Baidu, its domestic competitor.
The story is no different with social networking.
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