At a time when China's government has granted the foreign media greater freedom, it is tightening controls on Chinese who write about politically sensitive or embarrassing topics, human rights activists and journalists say.
International PEN, a writer's organization that calls itself the world's oldest human rights group, said Monday that local police prevented 20 Chinese writers from attending its international conference in Hong Kong over the weekend.
Some were warned not to go, while others who had permits to travel to Hong Kong, a Chinese territory under separate administration, had their documents seized at the border.
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