rtokens: Police gave no reason for detaining Wang on Friday and would not let his family meet him or say where he was being held , the group said .
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tokens: Police in Hangzhou , capital of the eastern province of Zhejiang , told Wang 's family that Wang would be sent to a study class , a euphemism for coercive ideological reform , the group said .
ltokens: Chinese police have detained veteran dissident Wang Donghai , the New York-based pressure group Human Rights in China said on Saturday .