..."I didn't think of it as protesting, just defending our rights,"...More than three decades after Beijing began allowing market reforms, China's 168 million migrant workers are discovering their labor rights through the spread of social media..."The party has to think twice before it suppresses the labor movement because it still claims to be a party for the working class," said Wang Jiangsong, a Beijing-based labor scholar...workers are organizing strikes and labor protests at a rate that has doubled each of the past four years to more than 1,300 last year, up from just 185 in 2011...Workers are allowed to strike, but only under the government-controlled All China Federation of Trade Unions...Deep suspicion of labor activism among authorities is rising...