A police officer stands behind a riot shield during a protest against a proposed extradition bill in Hong Kong, China June 12, 2019. REUTERS/Athit Perawongmetha

Protesters tear down metal barricades during a demonstration against a proposed extradition bill in Hong Kong, China June 12, 2019. REUTERS/Thomas Peter

Protesters march along a road demonstrating against a proposed extradition bill in Hong Kong, China June 12, 2019. REUTERS/Athit Perawongmetha

Protesters holding umbrellas occupy a street near a row of police officers outside the Legislative Council building during a demonstration against a proposed extradition bill in Hong Kong, China June 12, 2019. REUTERS/Thomas Peter

Hong Kong's Chief Executive Carrie Lam attends a news conference in Hong Kong, China August 13, 2019. REUTERS/Thomas Peter

Anti-extradition bill protesters peep through road barriers in front of the government complex during the march to demand democracy and political reforms in Hong Kong, China, August 18, 2019. Picture taken on August 18, 2019. REUTERS/Kim Hong-Ji

A pro-China supporter cleans up Lennon Walls of anti-government posters and memo notes outside Yuen Long MTR station in Hong Kong, China September 21, 2019. REUTERS/Tyrone Siu

A "Lennon Wall" is seen in Tai Po, Hong Kong, China September 21, 2019. REUTERS/Aly Song

Hong Kong's Chief Executive Carrie Lam addresses a news conference in Hong Kong, China September 5, 2019. REUTERS/Amr Abdallah Dalsh

Pro-China supporters hold up Chinese national flags facing Victoria Harbour during a rally in Hong Kong, China, September 29, 2019. REUTERS/Jorge Silva

A Pro-China supporter reacts during a rally at the Hong Kong Cultural Centre in Hong Kong, China, September 29, 2019. REUTERS/Jorge Silva

Pro-China supporters attend a rally at the Hong Kong Cultural Centre in Hong Kong, China, September 29, 2019. REUTERS/Jorge Silva

Hong Kong police officer Lau Chak-kei poses for a selfie alongside pro-China supporters during a rally at the Hong Kong Cultural Centre in Hong Kong, China, September 29, 2019. REUTERS/Jorge Silva

A pro-China supporter holds a Chinese national flag during a rally at Victoria Peak in Hong Kong, China, September 29, 2019. REUTERS/Jorge Silva

A schoolmate of a student protester who was shot by a policeman on Tuesday cries while participating in a student gathering at Tsuen Wan Public Ho Chuen Yiu Memorial College in solidarity with the student in Tsuen Wan, Hong Kong, China, October 2, 2019. REUTERS/Susana Vera

An alumna of Tsuen Wan Public Ho Chuen Yiu Memorial College participates in a student gathering in the school in solidarity with the student protester who was shot by a policeman on Tuesday in Tsuen Wan, Hong Kong, China, October 2, 2019. REUTERS/Susana Vera

Alumni of Tsuen Wan Public Ho Chuen Yiu Memorial College arrange paper cranes at a student gathering in the school in solidarity with the student protester who was shot by a policeman on Tuesday in Tsuen Wan, Hong Kong, China, October 2, 2019. REUTERS/Susana Vera

A pedestrian walks over graffiti on a crossing in Tsuen Wan, Hong Kong, China, October 2, 2019. REUTERS/Susana Vera

Policemen are seen in a vandalized store in Tsuen Wan, Hong Kong, China, October 2, 2019. REUTERS/Susana Vera

Employees of China Travel Service, a tourism and travel agency of the China government, are seen at their vandalized office in Tsuen Wan, Hong Kong, China, October 2, 2019. REUTERS/Susana Vera

A woman holds up a message as she gathers with others at West Kowloon Law Courts Building to show their support for the 96 anti-government protesters who were arrested days ago in Hong Kong, China, October 2, 2019. REUTERS/Athit Perawongmetha

People hold up signs and a mobile phone as they gather at West Kowloon Law Courts Building to show their support to 96 anti-government protesters who were arrested days ago in Hong Kong, China, October 2, 2019. REUTERS/Athit Perawongmetha

Hong Kong Chief Executive Carrie Lam walks past a barrier to meet petitioners before a weekly Executive Council meeting in Hong Kong, China, October 8, 2019. REUTERS/Tyrone Siu

An anti-government protester looks his phone at a makeshift gate during a standoff with riot police at the Chinese University of Hong Kong, Hong Kong, China November 14, 2019. REUTERS/Tyrone Siu

Anti-government protesters scout at a makeshift gate during a standoff with riot police at the Chinese University of Hong Kong, Hong Kong, China November 14, 2019. REUTERS/Tyrone Siu

Anti-government demonstrators gather to protest in Central, Hong Kong, China November 14, 2019. REUTERS/Athit Perawongmetha

Anti-government demonstrators and office workers build a roadblock with bricks during a protest in Central, Hong Kong, China November 14, 2019. REUTERS/Athit Perawongmetha

Office workers watch anti-government demonstrators block a road during a protest in Central, Hong Kong, China November 14, 2019. REUTERS/Athit Perawongmetha

Garbage are seen laid across a road by anti-government demonstrators as a barricade against the police during a protest in Central, Hong Kong, China November 14, 2019. REUTERS/Athit Perawongmetha

Anti-government demonstrators gather to protest as office workers look from an elevated walkway in Central, Hong Kong, China November 14, 2019. REUTERS/Athit Perawongmetha

People hold China and Hong Kong flags and signs as they participate in a pro-government rally to show their support for the police and government at the Legislative Council (LegCo) building in Hong Kong, China, November 16, 2019. REUTERS/Athit Perawongmetha

People hold a China national flag and signs as they participate in a pro-government rally to show their support for the police and government at the Legislative Council (LegCo) building in Hong Kong, China, November 16, 2019. REUTERS/Athit Perawongmetha

People gather during a pro-government rally to show their support for the police and government outside the Legislative Council (LegCo) building in Hong Kong, China, November 16, 2019. REUTERS/Athit Perawongmetha

Pro-government supporters and a riot policeman flash thumbs up during a rally in Hong Kong, China, November 16, 2019. REUTERS/Athit Perawongmetha

A pro-government supporter holds a sign during a rally to support for the police and government at the Legislative Council (LegCo) building in Hong Kong, China, November 16, 2019. REUTERS/Athit Perawongmetha

Objects left by anti-government demonstrators block a road during protests at the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

An anti-government demonstrator rests during protests at the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

Anti-government demonstrators rest in a sports hall during protests at the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

An anti-government demonstrator rests in a sports hall during protests at the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

An anti-government demonstrator uses binoculars to keep an eye during protests at the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

Molotov cocktails are seen in a box during protests at the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

A close-up view of an improvised catapult made by anti-government demonstrators is seen during protests at the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

People cross a road scattered with bricks outside the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

A fencing mask that belongs to an anti-government protester is seen on a road scattered with bricks outside the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

An anti-government protester holds a molotov cocktail alongside others on a road scattered with bricks outside the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi

An anti-government protester walks on top of an elevated walkway outside the Polytechnic University in Hong Kong, China, November 16, 2019. REUTERS/Adnan Abidi