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A Color Run was held in Baotou City of north China's Inner Mongolia Autonomous Region on Saturday to mark the 100th anniversary of the May Fourth Movement. While running, participants can throw powder at each other, dousing each other from head to toe in different colors. The May Fourth Movement started with mass student protests on May 4, 1919, against the warlord government's response to unfair deals for China that undermined the country's sovereignty.