Among the signatories Liu Xiaobo, an intellectual, was arrested on Monday. Another, Zhang Zuhua, was interrogated for 12 hours and then released. Scientist Jiang Qisheng and lawyer Pu Zhiqiang were also interrogated. Pu is closely monitored by police. Like Czechoslovakia’s ‘Charter 77’, this manifesto calls on the authorities to radically change the country’s oppressive system, and guarantee instead human rights, including freedom of religion.