The national security law was imposed in 2020. Hundreds of campaigners and ordinary Hongkongers have been arrested under it. Wong is the only person in that group charged twice under the law. Wong, 30, is already serving a 56-month term for conspiracy to commit subversion as one of the Hong Kong 47. He had been due for release in January.
He was among 47 people charged with conspiracy to commit subversion while still in prison in February 2021. That case remains the largest prosecution so far under the law.
On Thursday morning he entered court looking calm in a blue shirt and black glasses, nodding to supporters and scanning the public gallery and reporters. A crowd had gathered outside; dozens queued for hours for a seat.
A former Scholarism member, Lee, told the BBC the crackdown “seeks to rewrite a chapter of Hong Kong’s history and erase the contributions of an entire generation who believed they could shape the future of their city.” She added: “There are always so many unknowns.”.
Wong pleaded guilty to the latest charges earlier in September. Rights groups have called the collusion charge a deliberate attempt to keep him incarcerated.
After sentencing he thanked supporters and waved as he left.
The harshest sentence under the law so far went to former media tycoon Jimmy Lai, jailed for 20 years, also for colluding with foreign forces.
Two months and two days of the new term will run concurrently with his existing sentence, the judge said. A court press summary said a final sentence of 10 years was imposed. Wong has said: “Even as political power now poses a comprehensive challenge to the resilience of our civil society, I believe the people of Hong Kong will, as always, find a way to see things through.”.