Hong Kong sentenced a student activist to three years and seven months in prison after he pleaded guilty to secession, as authorities use a Beijing-drafted national security law to crack down on political dissent.

Tony Chung, 20, had faced as many as seven years behind bars after pleading guilty earlier this month to seeking to separate Hong Kong from mainland China between July and October 2020.

That guilty plea made Chung the third person to avoid fighting his case under the vaguely worded national security law. It was part of a deal struck with prosecutors that included submitting to money laundering charges relating to 133,000 Hong Kong dollars ($17,000).