HONG KONG – One of Hong Kong's most prominent pro-democracy activists, who was jailed as part of a China-imposed security crackdown, said on Dec 3 she had left Hong Kong for Canada after pressure from the authorities left her with mental health issues.

Ms Agnes Chow, 27 – a core member of a now-disbanded group of younger activists including Joshua Wong who helped drive Hong Kong's pro-democracy movement – said in posts on her Instagram account late on Dec 3 that she had left Hong Kong for studies in Canada.

Their group, Demosisto, dissolved hours after Beijing passed a sweeping national security law in 2020.

The law has stifled the pro-democracy movement and led to more than 280 arrests, drawing criticism from some Western governments that it is a tool of repression.

Beijing says the law has brought stability to Hong Kong after mass pro-democracy protests in 2019.

Ms Chow's posts – her first public comments since her release from prison in June 2021 – detailed how she had remained under “supervision” from the authorities.

Ms Chow was sentenced to 10 months in jail in Nov 2020 over an unauthorised assembly charge.

After she finished her jail term, she was put on police bail with the confiscation of her passport for an alleged national security charge, along with others including pro-democracy businessman Jimmy Lai.

Ms Chow said it was as if the police wanted to remind her that she had not regained her freedom, and to “not try to do anything”.

She said the pressures led her to be diagnosed with depression and post-traumatic stress disorder.

“Several emotional illnesses put my body and mind in a very unstable state,” added Ms Chow.

Ms Chow could not be reached by Reuters for comment.

There was no immediate response from the Hong Kong police.

Ms Chow said it was only in 2023, after she was accepted by a university in Toronto, that the police agreed to return her passport if she travelled to the Chinese city of Shenzhen.

The trip included visits to Chinese tech major Tencent and a “patriotic” exhibition on China's achievements.

"I was forced to go to mainland China in exchange for the opportunity to study abroad," she wrote.

Ms Chow was due to report to Hong Kong's security police later in December but decided not to return out of consideration for her personal safety and well-being. “Maybe I won't return for the rest of my life,” she wrote. REUTERS