Hong Kong’s Court of Appeal has upheld prison sentences for a group of activists in a landmark national security case, reaffirming earlier convictions in one of the most consequential legal proceedings in the city in recent years.

The ruling followed an appeal lodged by 12 individuals who had challenged both their convictions and the length of their sentences.

Judges rejected the arguments presented, concluding that the original verdicts and penalties were soundly grounded in law and did not warrant revision.

The case forms part of a broader prosecution involving dozens of opposition figures arrested in 2021, widely known for its scale and significance.

The defendants were charged with conspiracy to commit subversion after organising an unofficial primary election in 2020, an initiative authorities determined was designed to disrupt the functioning of government institutions.

Following extensive legal proceedings, many of those involved were sentenced in 2024 to prison terms ranging from four to ten years, while a small number were acquitted.

The appeal court’s decision confirms those outcomes, reinforcing the legal interpretation that the activities in question constituted a coordinated effort to undermine the constitutional order.

In its judgment, the court found that the strategy behind the primary election went beyond ordinary political participation, describing it as part of a concerted plan aimed at exerting pressure on the administration and altering governance through unconventional means.

The ruling has drawn varied reactions internationally.

Some foreign governments and advocacy groups have expressed concern over the application of national security legislation, while Hong Kong authorities maintain that the legal process has been conducted in accordance with established judicial standards and is essential for safeguarding stability and order.

The decision underscores the continued importance of national security law in shaping Hong Kong’s legal landscape, as courts navigate complex cases that test the boundaries between political activity and actions deemed to threaten institutional integrity.

With appeals now dismissed, the judgment is expected to stand as a defining reference point for future cases involving national security, reinforcing the judiciary’s role in interpreting and applying the framework governing such prosecutions.