HONG KONG — Dozens of prominent activists were sentenced to up to 10 years in prison on Tuesday in Hong Kong's biggest national security case under a sweeping law imposed by Beijing that crushed a once-thriving pro-democracy movement. The defendants were prosecuted in 2021 for their roles in an unofficial primary election under the 2020 national security law. They were accused of attempting to paralyze Hong Kong's government and force the city's leader to resign by aiming to win a legislative majority and using it to block government budgets indiscriminately.

The 45 convicted received prison terms ranging from four years and two months to 10 years. Legal scholar Benny Tai was given the longest sentence. They either pleaded guilty to or were found guilty of conspiracy to commit subversion by three government-approved judges.

The judges said in the verdict that the activists' plans to effect change through the election would have undermined the government's authority and created a constitutional crisis. Two of the 47 original defendants were acquitted. Observers said the case illustrated how authorities suppressed dissent following huge anti-government protests in 2019, alongside media crackdowns and reduced public choice in elections.

The drastic changes reflect how Beijing's promise to retain the former British colony's civil liberties for 50 years when it returned to China in 1997 is increasingly threadbare, they said. Beijing and Hong Kong governments insist the law is ne.