Protesters hold a Tibetan flag and a banner reading "Free Hong Kong - Revolution" during a demonstration at the Acropolis Propylaea, in Athens, Greece, October 17, 2021. REUTERS/Elias Marcou

A giant portrait of Sun Yat-sen is seen at the Great Hall of the People before a meeting commemorating the 110th anniversary of Xinhai Revolution, in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping applauds at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

A giant portrait of Sun Yat-sen hangs above Chinese President Xi Jinping and other leaders attending a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping arrives for a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

A giant portrait of Sun Yat-sen hangs above Chinese President Xi Jinping and other leaders arriving for a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese delegates wearing face masks following the coronavirus disease (COVID-19) outbreak applaud at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping and other leaders attend a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping and other leaders attend a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping and delegates attend a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping leaves at the end of a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Paramilitary police officers leave the Great Hall of the People following a meeting commemorating the 110th anniversary of Xinhai Revolution, in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping speaks at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

An attendant serves tea in between Chinese President Xi Jinping and Premier Li Keqiang at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping applauds at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

A giant portrait of Sun Yat-sen hangs above Chinese President Xi Jinping and other leaders arriving for a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping arrives for a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping applauds at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

A giant portrait of Sun Yat-sen hangs above Chinese President Xi Jinping and other leaders attending a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping and other leaders stand under a giant portrait of Sun Yat-sen at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping speaks at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping speaks at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping speaks at a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Chinese President Xi Jinping arrives for a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

A giant portrait of Sun Yat-sen is seen at the Great Hall of the People before a meeting commemorating the 110th anniversary of Xinhai Revolution, in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

People walk past a portrait of Sun Yat-sen before a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Security members hold umbrellas for delegates arriving to the Great Hall of the People for a meeting commemorating the 110th anniversary of Xinhai Revolution, in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

A security member wearing a face mask following the coronavirus disease (COVID-19) outbreak stands guard at the Great Hall of the People before a meeting commemorating the 110th anniversary of Xinhai Revolution, in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Military delegates arrive for a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

Military delegates arrive for a meeting commemorating the 110th anniversary of Xinhai Revolution at the Great Hall of the People in Beijing, China October 9, 2021. REUTERS/Carlos Garcia Rawlins

An aerial view shows St. Isaac's Cathedral, which will host the wedding of Grand Duke of Russia George Romanov and his Italian fianc?e Victoria Bettarini, in central Saint Petersburg, Russia September 30, 2021. Grand Duke George Mikhailovich Romanov, the Head of the Russian Imperial House Grand Duchess Maria's son, will marry Victoria Romanovna Bettarini on October 1, 2021 as the country's first royal wedding since the Russian Revolution of 1917 will take place in the city of St Petersburg, which used to be the capital of the Russian Empire. Picture taken with a drone. REUTERS/Anton Vaganov

An aerial view shows St. Isaac's Cathedral, which will host the wedding of Grand Duke of Russia George Romanov and his Italian fianc?e Victoria Bettarini, in central Saint Petersburg, Russia September 30, 2021. Grand Duke George Mikhailovich Romanov, the Head of the Russian Imperial House Grand Duchess Maria's son, will marry Victoria Romanovna Bettarini on October 1, 2021 as the country's first royal wedding since the Russian Revolution of 1917 will take place in the city of St Petersburg, which used to be the capital of the Russian Empire. Picture taken with a drone. REUTERS/Anton Vaganov

An aerial view shows St. Isaac's Cathedral, which will host the wedding of Grand Duke of Russia George Romanov and his Italian fiancée Victoria Bettarini, in central Saint Petersburg, Russia September 30, 2021. Grand Duke George Mikhailovich Romanov, the Head of the Russian Imperial House Grand Duchess Maria's son, will marry Victoria Romanovna Bettarini on October 1, 2021 as the country's first royal wedding since the Russian Revolution of 1917 will take place in the city of St Petersburg, which used to be the capital of the Russian Empire. Picture taken with a drone. REUTERS/Anton Vaganov

An aerial view shows St. Isaac's Cathedral, which will host the wedding of Grand Duke of Russia George Romanov and his Italian fiancée Victoria Bettarini, in central Saint Petersburg, Russia September 30, 2021. Grand Duke George Mikhailovich Romanov, the Head of the Russian Imperial House Grand Duchess Maria's son, will marry Victoria Romanovna Bettarini on October 1, 2021 as the country's first royal wedding since the Russian Revolution of 1917 will take place in the city of St Petersburg, which used to be the capital of the Russian Empire. Picture taken with a drone. REUTERS/Anton Vaganov

An aerial view shows St. Isaac's Cathedral, which will host the wedding of Grand Duke of Russia George Romanov and his Italian fianc?e Victoria Bettarini, in central Saint Petersburg, Russia September 30, 2021. Grand Duke George Mikhailovich Romanov, the Head of the Russian Imperial House Grand Duchess Maria's son, will marry Victoria Romanovna Bettarini on October 1, 2021 as the country's first royal wedding since the Russian Revolution of 1917 will take place in the city of St Petersburg, which used to be the capital of the Russian Empire. Picture taken with a drone. REUTERS/Anton Vaganov

An aerial view shows St. Isaac's Cathedral, which will host the wedding of Grand Duke of Russia George Romanov and his Italian fiancée Victoria Bettarini, in central Saint Petersburg, Russia September 30, 2021. Grand Duke George Mikhailovich Romanov, the Head of the Russian Imperial House Grand Duchess Maria's son, will marry Victoria Romanovna Bettarini on October 1, 2021 as the country's first royal wedding since the Russian Revolution of 1917 will take place in the city of St Petersburg, which used to be the capital of the Russian Empire. REUTERS/Anton Vaganov

A member of an Afghanistan's robotics team Lida Azizi, who arrived to Mexico in August, rides a bicycle near the Monument to the Revolution in Mexico City, Mexico September 19, 2021 REUTERS/Raquel Cunha

Anna Mason, Partner on Revolution's Rise of the Rest Seed Fund, speaks during the Skybridge Capital SALT New York 2021 conference in New York City, U.S., September 13, 2021. REUTERS/Brendan McDermid REFILE - CORRECTING YEAR OF THE EVENT

Anna Mason, Partner on Revolution's Rise of the Rest Seed Fund, speaks during the Skybridge Capital SALT New York 2021 conference in New York City, U.S., September 13, 2021. REUTERS/Brendan McDermid REFILE - CORRECTING YEAR OF THE EVENT

People sit on a sculpture spelling out the word "revolution" as Lebanon marks the one-year anniversary of the explosion in Beirut, Lebanon August 4, 2021. REUTERS/Emilie Madi

Demonstrators hold a heart shaped flower arrangement during a protest to mark the 68th anniversary of the Moncada barracks attack, outside the Cuban Embassy in Mexico City, Mexico July 26, 2021. REUTERS/Luis Cortes

A demonstrator attends a protest to mark the 68th anniversary of the Moncada barracks attack, outside the Cuban Embassy in Mexico City, Mexico July 26, 2021. REUTERS/Luis Cortes

A demonstrator holds a heart shaped flower arrangement next to a banner with a photo of late Cuban President Fidel Castro during a protest to mark the 68th anniversary of the Moncada barracks attack, outside the Cuban Embassy in Mexico City, Mexico July 26, 2021. REUTERS/Luis Cortes

Demonstrators attend a protest to mark the 68th anniversary of the Moncada barracks attack, outside the Cuban Embassy in Mexico City, Mexico July 26, 2021. REUTERS/Luis Cortes

Demonstrators dance during a protest to mark the 68th anniversary of the Moncada barracks attack, outside the Cuban Embassy in Mexico City, Mexico July 26, 2021. REUTERS/Luis Cortes

Demonstrators attend a protest to mark the 68th anniversary of the Moncada barracks attack, outside the Cuban Embassy in Mexico City, Mexico July 26, 2021. REUTERS/Luis Cortes

An image of Cuba's former President and First Secretary of the Communist Party Raul Castro is displayed next to the Jose Marti monument (not pictured) to mark the 68th anniversary of the Moncada barracks attack, Havana, Cuba, July 26, 2021. REUTERS/Alexandre Meneghini

State workers take part in a ceremony to mark the 68th anniversary of the Moncada barracks attack, Havana, Cuba, July 26, 2021. REUTERS/Alexandre Meneghini

A Cuban flag is displayed on the street to mark the 68th anniversary of the Moncada barracks attack, Havana, Cuba, July 26, 2021. REUTERS/Alexandre Meneghini

Images of Cuba's President and First Secretary of the Communist Party Miguel Diaz-Canel and Cuba's former President and First Secretary of the Communist Party Raul Castro are displayed during a ceremony held by security agents to mark the 68th anniversary of the Moncada barracks attack, Havana, Cuba, July 26, 2021. REUTERS/Alexandre Meneghini

A Cuban flag is displayed on the street to mark the 68th anniversary of the Moncada barracks attack, Havana, Cuba, July 26, 2021. REUTERS/Alexandre Meneghini

State workers take part in a ceremony to mark the 68th anniversary of the Moncada barracks attack, Havana, Cuba, July 26, 2021. REUTERS/Alexandre Meneghini

The grave stone for Winthrop Sargent reads "A Soldier of the Revolution," ahead of the Fourth of July Independence Day holiday in the U.S., at the Cove Hill Cemetery in Gloucester, Massachusetts, U.S., July 3, 2021. REUTERS/Brian Snyder

A U.S. flag is planted next to the grave stone for Winthrop Sargent, "A Soldier of the Revolution," ahead of the Fourth of July Independence Day holiday in the U.S., at the Cove Hill Cemetery in Gloucester, Massachusetts, U.S., July 3, 2021. REUTERS/Brian Snyder

A U.S. flag is planted next to the grave stone for Winthrop Sargent, "A Soldier of the Revolution" ahead of the Fourth of July Independence Day holiday in the U.S., at the Cove Hill Cemetery in Gloucester, Massachusetts, U.S., July 3, 2021. REUTERS/Brian Snyder

A U.S. flag is planted next to the grave stone for Joshua Gott, "A Soldier of the American Revolution", ahead of the Fourth of July Independence Day holiday in the U.S., at the Cove Hill Cemetery in Gloucester, Massachusetts, U.S., July 3, 2021. REUTERS/Brian Snyder

Sudanese take part in a march against the Rapid Support Forces, who they blame for a raid on protesters who had camped outside the defense ministry during the 2019 revolution, in Khartoum, Sudan, June 3, 2021. REUTERS/Mohamed Nureldin Abdallah

Sudanese take part in a march against the Rapid Support Forces, who they blame for a raid on protesters who had camped outside the defense ministry during the 2019 revolution, in Khartoum, Sudan, June 3, 2021. REUTERS/Mohamed Nureldin Abdallah

Sudanese take part in a march against the Rapid Support Forces, who they blame for a raid on protesters who had camped outside the defense ministry during the 2019 revolution, in Khartoum, Sudan, June 3, 2021. REUTERS/Mohamed Nureldin Abdallah