In early 2008, Guo Quan, a university professor who had been dismissed after having founded a democratic opposition party, announced plans to sue Yahoo! and Google in the United States for having blocked his name from search results in China.
On 28 Feb 2008 Elinor Mills of Businessweek reported that several plaintiffs filed suit in Oakland, California federal court against Internet portal Yahoo, alleging that Yahoo provided information to the Chinese authorities that led to the 2003 arrest of Li Zhi, who has served about half of an eight-year sentence.
Both Plaintiff Zheng Cunzhu and plaintiff Guo Quan alleged that Yahoo's business tactic had caused them personal and financial harm. Zheng Cunzhu claimed :" lost his property in China when he did not return for fear of getting arrested for his pro-democracy activities" and Guo Quan claimed that "he lost business when his name and that of his garment company were blocked by the Yahoo search results." List of claims against Yahoo:
violation of international law including torture and prolonged detention
in November Yahoo settled an out of court lawsuit filed by family members of two other dissidents serving 10-year sentences after Yahoo handed their account information over to the Chinese government. And "last week Yahoo Chief Executive Jerry Yang sent U.S. Secretary of StateCondoleezza Rice a letter asking the government to secure the release of dissidents jailed in China for their pro-democracy sentiments."
Guo's very public open letters to President Hu Jintao demanding multi-party elections and the depoliticisation of the People's Liberation Army, was widely published in the internet blogosphere as well as the tradition media. Since then the Chinese cyber-police had begun to black out his blogs.
On 21 May 2008 Jonathan Watts of The Guardian reported: Chinese police have detained Guo Quan, a political dissident who criticized the government's handling of the Sichuan earthquake. Guo was seized outside his home by seven or eight police officers on 17 May 2008. They searched his house and confiscated his computer
Guo Quan's wife Li Jing told reporter that Guo had been detained many times before, for a few days at a time. Now it could be for longer. "The police told me to prepare myself psychologically," she said. On 6 Feb 2008 Guo Quan told Jane Macartney, of The Times "that he had now found that the Chinese Yahoo! site had also blocked his name and he planned to bring actions against both companies." Mr Guo said: "Since January 1 a lot of friends told me that websites with my name had been closed. They told me it's impossible to search for my information on Google and Yahoo!" The PEN American Center wrote: On 13 Nov 2008 cnews reported that Guo Quan, was arrested Thursday in the city of Nanjing. According to his wife, the police's charge was "subversion of state power" Chinese police routinely uses the charge of "subversion of state power" to imprison dissidents for years. On 17 Oct 2009, Reuters reported that he was sentenced to 10 years in prison. He has been described as a political prisoner.