<p>Blind activist Chen Guangcheng with his wife and son outside their home in northeast China's Shandong province in 2005. He's been held incommunicado at his home for more than a year and has become the focus of a microblog campaign by human-rights activists. </p>
In China, microblogs are transforming the way activists draw attention to human-rights cases. Despite strict Internet controls, netizens are using Chinese Twitter as a powerful tool.
Two recent cases show just how effective microblogs can be in shaping the debate over human-rights abuses and driving citizen activism.
One case involves a chilling video that was recently released online. In it, a man lies under a green quilt, apparently naked. His left eye and right ear are covered with bandages; the skin on his feet is discolored and peeling.