He said he will continue his appeal against the Chongqing Laojiao Committee that sentenced him to jail, and will seek State compensation and compensation for mental damage.
Last September, Chongqing Laojiao Committee sentenced Ren, then a village official who was about to become a formal civil servant, to two years in confinement for his spreading more than 100 pieces of "negative comments and information" about current affairs and domestic political reform on his micro blog and QQ, a Chinese instant messaging service.
Ren's sentence came amid a citywide crime crackdown initiated by former Chongqing Party chief Bo Xilai. Bo was sacked in March this year for severe disciplinary violations.
Ren decided to file a lawsuit against the committee in August, and was released on Monday after serving about half of the term as the committee said the decision was "inappropriate".
Ren's case has, again, prompted speculation on the disputed laojiao system, or re-education through labor, which can take a person's freedom for up to four years without a trial according to rules and regulations in China.
Yang Junxiang, a media officer of Chongqing No 3 Intermediate People's Court, said on Tuesday the panel of three judges rejected Ren's lawsuit because it has exceeded the time limit for filing a lawsuit against an administrative decision, which is required within three months under the country's Administrative Procedure Law.
In a statement released after the court hearing on Tuesday afternoon, the court said: "To carry out the right to protect oneself by filing a case should be abided by law".
Landmark building should respect the public's feeling