Police on Tuesday said they had rearrested 13 men in connection with the social unrest in 2019 and charged 12 of them with rioting and the other with possessing anything with intent to destroy or damage property.
The suspects, aged between 25 and 54, will appear in the Eastern Court on Wednesday for mention.
Some also face additional charges, such as possessing offensive weapons and resisting police officers in the due execution of their duties.
Police said a total of 57 protesters were arrested in the vicinity of Wan Chai on October 1, 2019 on suspicion of unlawful assembly.
But they later refused to be bailed while pending further investigation, the force said.