Charles Wong, one of the founders of the Bauhinia Party, Hong Kong's newest political party, is photographed in his office in Hong Kong, China February 26, 2021. Picture taken February 26, 2021. REUTERS/James Pomfret

Charles Wong, one of the founders of the Bauhinia Party, Hong Kong's newest political party, is photographed in his office in Hong Kong, China February 26, 2021. Picture taken February 26, 2021. REUTERS/James Pomfret

Charles Wong, one of the founders of the Bauhinia Party, Hong Kong's newest political party, is photographed in his office in Hong Kong, China February 26, 2021. Picture taken February 26, 2021. REUTERS/James Pomfret

Charles Wong, one of the founders of the Bauhinia Party, Hong Kong's newest political party, is photographed in his office in Hong Kong, China February 26, 2021. Picture taken February 26, 2021. REUTERS/James Pomfret

Pro-democracy activists including Alvin Yeung, Eddie Chu and Jeremy Tam walk to a prison van to head to court, over national security law charges, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Joshua Wong looks on upon arriving at Lai Chi Kok Reception Centre after he remained in custody over the national security law charge, in the early morning, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu TPX IMAGES OF THE DAY

Pro-democracy activist Joshua Wong looks on upon arriving at Lai Chi Kok Reception Centre after he remained in custody over the national security law charge, in the early morning, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Joshua Wong looks on upon arriving at Lai Chi Kok Reception Centre after he remained in custody over the national security law charge, in the early morning, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activists Sam Cheung, Lam Cheuk-ting, Raymond Chan Chi-chuen and Owen Chow walk to a prison van to head to court, over national security law charges, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activists Sam Cheung, Lam Cheuk-ting, Raymond Chan Chi-chuen and Owen Chow walk to a prison van to head to court, over national security law charges, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activists including Alvin Yeung, Eddie Chu and Jeremy Tam walk to a prison van to head to court, over national security law charges, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activists Joshua Wong and Wu Chi-wai walk to a prison van to head to court, over national security law charges, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activists Sam Cheung, Lam Cheuk-ting and Lester Shum walk to a prison van to head to court, over national security law charges, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activists Joshua Wong, Wu Chi-wai and Tam Tak-chi walk to a prison van to head to court, over national security law charges, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Benny Tai flashes thumbs up as he walks to a prison van to head to court, over the national security law charge, in the early morning, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Benny Tai flashes thumbs up as he walks to a prison van to head to court, over the national security law charge, in the early morning, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Benny Tai walks to a prison van to head to court over the national security law charge, in the early morning, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Joshua Wong looks on upon arriving at Lai Chi Kok Reception Centre after he remained in custody over the national security law charge, in the early morning, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Benny Tai arrives at Lai Chi Kok Reception Centre by prison van after he remained in custody over the national security law charge, in the early morning, in Hong Kong, China March 2, 2021. REUTERS/Tyrone Siu

Security personnel shut the gate at West Kowloon Magistrates' Courts during a court hearing for pro-democracy activists facing charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Police officers stand as supporters of pro-democracy activists facing charges related to national security gather outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

A police officer raises a warning sign as they try to disperse supporters outside West Kowloon Magistrates' Courts where pro-democracy activists face charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

A police officer holds a pepper spray canister as he tries to disperse supporters of pro-democracy activists as they queue up for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Supporters of pro-democracy activists queue up for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Police raise a warning flag as they try to disperse supporters of pro-democracy activists as they queue for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

A supporter of pro-democracy activists holds a placard with the names of the activists as he queues for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Supporters of pro-democracy activists raise their hands in a symbol of the "Five demands, not one less" as they queue for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Supporters of pro-democracy activists raise their hands in a symbol of the "Five demands, not one less" as they queue for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Protesters gesture outside West Kowloon Magistrates' Courts where pro-democracy activists face charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Protesters gesture outside West Kowloon Magistrates' Courts where pro-democracy activists face charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Police officers raise signs warning protesters of national security law violations as they gather outside West Kowloon Magistrates' Courts where pro-democracy activists face charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Supporters of pro-democracy activists queue up outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

A supporter of pro-democracy activists holding an umbrella raises a three-finger salute as they queue up outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

A supporter of pro-democracy activists holds a Union Jack flag as others queue up outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Police stand guard as supporters of pro-democracy activists queue up outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Pro-government supporter holds a Chinese flag outside West Kowloon Magistrates' Courts where pro-democracy activists appear over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Supporters of pro-democracy activists place banners outside West Kowloon Magistrates' Courts during a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Foreign diplomats queue up outside West Kowloon Magistrates' Courts for a court hearing for pro-democracy activists over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

A supporter of pro-democracy activists holds a sign outside West Kowloon Magistrates' Courts where others queue up for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik TPX IMAGES OF THE DAY

Police officers ask supporters of pro-democracy activists to leave during a queue outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

A supporter of pro-democracy activists gestures next to others holding a banner as they queue up outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Chinese and Hong Kong flags flutter outside West Kowloon Magistrates' Courts as supporters of pro-democracy activists queue up for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Supporters of pro-democracy activists gesture as they queue up outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Supporters of pro-democracy activists hold a banner reading "release political prisoners" as they queue up outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Supporters of pro-democracy activists gesture as they queue up outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

A man holds a sign reading "release political prisoners" as supporters of pro-democracy activists queue up outside West Kowloon Magistrates' Courts for a court hearing over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Supporters of pro-democracy activists hold banners as they queue up for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Supporters of pro-democracy activists hold banners as they queue up for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

A pro-government supporter holds a Chinese flag outside West Kowloon Magistrates' Courts where pro-democracy activists appear over charges related to national security, in Hong Kong, China March 1, 2021. REUTERS/Lam Yik

Supporters of pro-democracy activists hold a banner as they queue up for a court hearing over national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu TPX IMAGES OF THE DAY

A supporter of pro-democracy activists holds a chair while queuing up to attend a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

A police van, part of a convoy transporting pro-democracy activists to West Kowloon Magistrates? Courts for their hearing over the national security law charges, arrives outside the court in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Police officers stand near a police van, part of a convoy transporting pro-democracy activists to West Kowloon Magistrates? Courts for their hearing over the national security law charges, as the vehicle arrives outside the court in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

A police arrives West Kowloon Magistrates’ Courts by police van with pro-democracy activist, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Lam Cheuk-ting raises his hand as he arrives at West Kowloon Magistrates' Courts in a police van for a hearing over the national security law charges in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Benny Tai and Mike Lam King-Nam arrives at West Kowloon Magistrates' Courts in a police van for a hearing over the national security law charges in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Pro-democracy activist Sam Cheung arrives at West Kowloon Magistrates' Courts in a police van for a hearing over the national security law charges in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

Supporters hold a banner to support pro-democracy activists as they queue up for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

A supporter holds a banner with supportive messages for pro-democracy activists while queuing up for a court hearing over the national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu

A supporter holds a sign with photos of pro-democracy activists while queuing up for the court hearing over national security law outside West Kowloon Magistrates' Courts, in Hong Kong, China March 1, 2021. REUTERS/Tyrone Siu