Hu Jia – who was released from prison last year – was also interrogated by police after he used his Twitter account to call on the authorities to allow the family of another jailed human rights lawyer, Gao Zhisheng, prison visits.
Police raided his home on Wednesday evening and took away two computers. Mr Hu was then summoned to questioning on Thursday morning.
He spoke to reporters by telephone from a Beijing police station but said he was unable to give further details about why he was being interrogated.
He said, however, his wife was away and he was home alone with his young daughter when eight police officers arrived and searched his flat.
“When I was detained last time [in 2007], a bunch of people entered my house like last night, and raided and searched the place, but my daughter was only 45 days old then and probably does not remember,” he said.
“But now she’s four, she understands a little more, and I’m worried adult squabbles can affect an innocent child, so I made my daughter go to her room to read books and play with her Barbie dolls,” he added.
Mr Hu was jailed in 2008 after police accused him of collaborating with foreign nationals to disrupt the Beijing Olympics.
The 38 year-old – who advocated a broad range of civil liberties before he was imprisoned – was released last year after serving a three and half year sentence for sedition.
Twitter is banned in China but many internet users use a VPN – virtual private network – to breach China’s notorious firewall which blocks a huge range of banned website deemed sensitive by the authorities.
Mr Hu posted complaints about the ban on visitation rights granted to fellow activist Mr Guo, who was returned to jail last month.
It is understood his Twitter posts were spotted by China’s internet police.
