Wong, who pleaded guilty to organizing and participating in the protest, was sentenced to 13 and a half months in prison. Chow, who also pleaded guilty to participating in the protest and instigating others to participate, was given 10 months, while Lam was given seven months after pleading guilty to incitement.
The protest took place on June 21 last year and saw thousands of people surround the police headquarters as they demonstrated against excessive police force against the protesters, along with a bill extradition now withdrawn that would have allowed the extradition of suspects to mainland China.
The imprisonment of the trio, known for their advocacy for democracy in Hong Kong both at home and abroad, comes as Beijing tightens its control over the semi-autonomous city after months of anti-government protests throughout the year last, which sometimes saw violent clashes between protesters and police. In June, Beijing imposed a sweeping national security law on Hong Kong to suppress dissent.
This is the first time 23-year-old Chow has been sentenced to prison. Wong, 24, and Lam, 26, had previously been jailed on charges related to their activism.