Crowds greeting returned boy
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Kidnapped toddler found by internet users

In China tens of thousands of children are abducted from their families every year and most of them disappear without trace.

But in recent days the country has been gripped by the story of one six-year-old boy reunited with his parents three years after being snatched off the street.

The BBC's China correspondent Damian Grammaticas explains this rare success depended on the country's half a billion internet users.