A giant Chinese flag is seen on Chinese National Day, in Hong Kong, China, October 1, 2021. REUTERS/Tyrone Siu 

Paramilitary police officers keep watch as people climb the Great Wall on National Day holiday following an outbreak of the coronavirus disease (COVID-19) in Beijing, China, October 1, 2021. REUTERS/Thomas Peter 

Pro-China supporters hold a giant Chinese flag on Chinese National Day, in Hong Kong, China, October 1, 2021. REUTERS/Tyrone Siu 

Participants stand in front of a giant flower basket arrangement set up ahead of the Chinese National Day, before a ceremony at the Monument to the People's Heroes on Tiananmen Square to mark Martyrs' Day, in Beijing, China September 30, 2021. REUTERS/Carlos Garcia Rawlins TPX IMAGES OF THE DAY 

People climb the Great Wall on National Day holiday following an outbreak of the coronavirus disease (COVID-19) in Beijing, China, October 1, 2021. REUTERS/Thomas Peter 

A pro-China supporter pushes a doll with Chinese flag on Chinese National Day, in Hong Kong, China, October 1, 2021. REUTERS/Tyrone Siu 

Helicopters with Chinese and Hong Kong flags fly past during a flag-raising ceremony marking the Chinese National Day in Hong Kong, China October 1, 2021. REUTERS/Lam Yik 

Pro-China supporters wave Chinese flags to celebrate Chinese National Day, in Hong Kong, China, October 1, 2021. REUTERS/Tyrone Siu 

Children react as they attend an event to celebrate Chinese National Day, in Hong Kong, China, October 1, 2021. REUTERS/Tyrone Siu 

A pro-China supporter attends an event to celebrate Chinese National Day, in Hong Kong, China, October 1, 2021. REUTERS/Tyrone Siu 

Police officers raise Chinese and Hong Kong flags during a ceremony to mark the Chinese National Day in Hong Kong, China October 1, 2021. REUTERS/Lam Yik 

Pro-China supporters pose for a photo in front of an advertisement of singer Anson Lo, a member of the Hong Kong boy group Mirror, on Chinese National Day, in Hong Kong, China, October 1, 2021. REUTERS/Tyrone Siu 

Chinese flags are reflected in the glasses of a supporter on Chinese National Day in Hong Kong, China, October 1, 2021. REUTERS/Tyrone Siu TPX IMAGES OF THE DAY 

Pro-China supporters dance during an event on Chinese National Day, in Hong Kong, China, October 1, 2021. REUTERS/Tyrone Siu 

Students and teachers participate in a flag-raising ceremony during the morning assembly at a school to mark the Chinese National Day in Hong Kong, China October 1, 2021. REUTERS/Lam Yik 

Students and teachers participate in a flag-raising ceremony during the morning assembly at a school to mark the Chinese National Day in Hong Kong, China October 1, 2021. REUTERS/Lam Yik 

Chinese and Hong Kong flags are pictured outside a mall, ahead of the Chinese National Day, in Hong Kong, China. September 28, 2021. REUTERS/Tyrone Siu?