They include prominent campaigners, former lawmakers and ordinary citizens who joined the pro-democracy movement.

The departing top court judge says the city's rule of law has been "profoundly compromised".

The court acquitted two other defendants, saying it "cannot be sure" that they were "parties to the scheme".

The group say their names have been cited dozens of times during the trial of the media mogul.

Hong Kong has introduced a law called Article 23 - raising fears about civil liberties.

Beijing and Hong Kong defend the controversial law, saying it is necessary for the city's stability.

Authorities say Article 23 is necessary for stability, but critics fear it will further erode civil liberties.

A simple guide to the national security law China has passed in Hong Kong and why it matters.