Giving up on that attempt, for fear of her young son's life, Park headed with the group to Beijing and lived in hiding until a Christian pastor in 2007 directed her to the UN refugee agency.
She was eventually granted asylum in Britain with her husband and son in January 2008 and was resettled in Bury, part of the Greater Manchester conurbation in northwest England.
The former schoolteacher worked in a Korean restaurant in Manchester, learning English at an adult college, and became a human rights activist, publicizing abuses in her homeland and helping other North Koreans to settle in Britain.
"Bury is my motherland," she said, likening her experience of learning English in the gritty market town to being reborn.
She joined the Conservatives in 2016. The center-right party's policy on asylum-seekers is less welcoming than others, but Park sees no contradiction in running under its banner after being selected to run as a ward councilor in Bury.
She identified Conservative values as "freedom, justice, education, family life" and said: "North Korean people need these values and many UK people too need these values."
However, electoral campaigning is suspended owing to the coronavirus pandemic, and her chances of success in May are slim.
The ward in Bury is a stronghold of the opposition Liberal Democrats, and in previous elections in 2019 the Conservative candidate came a distant fifth.
But merely being able to stand in a free, multi-party election is a distinct novelty for Park.
Elections to North Korea's rubber-stamp parliament are limited to a single candidate chosen by dynastic leader Kim Jong-un's ruling front.
Win or lose in May, Park said: "This experience has improved my life for next time. I will continue with working with Conservatives, I will work with residents for community work, not just with refugees."
Other escapees have forged political careers in democratic South Korea.
Thae Yong-ho, Pyongyang's deputy ambassador to London, became the first to be directly elected by South Korean voters last year following his defection in 2016.
Hazel Smith, a North Korea expert at the School of Oriental and African Studies in London, said the regime in Pyongyang largely treats defectors in the West as "irrelevant", although it does monitor higher-profile figures such as Thae.
"It's certainly news that a North Korean is standing to be a Conservative in the UK. It reinforces the fact that North Koreans can equally participate in a political process," she said.
"But the future for most North Koreans, if they're anti-government, is looking to northeast China or South Korea as a model."
Park says regime operatives have not given her any unwelcome attention since she took on a political profile, and she would not be silenced if they did.
"They took away everything -- my past, my family, my friends, but they never killed our spirit," she said.
"That's why we always fight this evil. I want to stand up by fighting for other people's freedoms." (AFP)