Wang Lihong, 56, pleaded not guilty to the charge which stemmed from her participation in a demonstration outside a court in Fuzhou city in southern China in April last year.
The gathering was in support of three bloggers accused of slander after they tried to help an illiterate woman pressure the authorities to reinvestigate her daughter’s death.
One of Wang’s lawyers, Mr Han Yicun, said the trial lasted two-and-a-half hours and that a verdict was expected later this month. If convicted, she faces up to five years in jail.
About half a dozen people linked arms outside the court to show their support for Wang. They were surrounded by the police.
Representatives from eight countries and the European Union were also present. They were taken into the courthouse but were not allowed to observe the trial.
Wang was detained by police in Beijing in late March during a crackdown on activists as the authorities moved to prevent the growth of a Middle East-style protest movement.
Wang’s son, Mr Qi Jianxiang, 26, said his mother began pursuing rights issues in 2008 after retiring from a business renovating and renting out basement dwellings. She took it upon herself to investigate reports of injustice that had spread on the Internet, he said.
Last October, Wang also joined other activists in celebrating the awarding of the Nobel Peace Prize to jailed Chinese dissident Liu Xiaobo. AP