Aircraft fly in the form of 100 ahead of the 100th founding anniversary of the Communist Party of China, in Beijing, China June 19, 2021. REUTERS/Yew Lun Tian

Aircraft fly in formation ahead of the 100th founding anniversary of the Communist Party of China, in Beijing, China June 19, 2021. REUTERS/Yew Lun Tian

Aircraft fly in formation ahead of the 100th founding anniversary of the Communist Party of China, in Beijing, China June 19, 2021. REUTERS/Yew Lun Tian

Members of the communist-affiliated trade union PAME shout slogans as they take part in a protest during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME demonstrate in front of the parliament during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME demonstrate in front of the parliament during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME demonstrate in front of parliament during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Alkis Konstantinidis

Members of the communist-affiliated trade union PAME demonstrate in front of parliament during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Alkis Konstantinidis

People take pictures of an installation marking the upcoming 100th founding anniversary of the Communist Party of China, in Beijing, China, June 16, 2021. REUTERS/Thomas Peter

A worker installs plants at an installation marking the upcoming 100th founding anniversary of the Communist Party of China in front of an office building, in Beijing, China, June 16, 2021. REUTERS/Thomas Peter

People walk past an installation marking the upcoming 100th founding anniversary of the Communist Party of China, in Beijing, China, June 16, 2021. REUTERS/Thomas Peter

A woman takes pictures of an installation marking the upcoming 100th founding anniversary of the Communist Party of China, in Beijing, China, June 16, 2021. REUTERS/Thomas Peter

People walk past an installation marking the upcoming 100th founding anniversary of the Communist Party of China, in Beijing, China, June 16, 2021. REUTERS/Thomas Peter

People walk past an installation marking the upcoming 100th founding anniversary of the Communist Party of China, in Beijing, China, June 16, 2021. REUTERS/Thomas Peter

People walk past an installation marking the upcoming 100th founding anniversary of the Communist Party of China, in Beijing, China, June 16, 2021. REUTERS/Thomas Peter

A member of the communist-affiliated trade union PAME holds a flare as he takes part in a protest during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME take part in a protest during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME demonstrate in front of the parliament during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Costas Baltas

A member of the communist-affiliated trade union PAME shouts slogans as he takes part in a protest during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME take part in a protest during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME demonstrate in front of the parliament during a 24-hour strike ahead of a parliamentary vote on a new labour bill, in Athens, Greece, June 16, 2021. REUTERS/Alkis Konstantinidis

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece, June 10, 2021. REUTERS/Louiza Vradi

A man waves a flag as members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece, June 10, 2021. REUTERS/Louiza Vradi

Members of the communist-affiliated trade union PAME demonstrate against a planned labour bill, during a 24-hour strike in Athens, Greece, June 10, 2021. REUTERS/Alkis Konstantinidis

Members of the communist-affiliated trade union PAME demonstrate against a planned labour bill, during a 24-hour strike in Athens, Greece, June 10, 2021. REUTERS/Alkis Konstantinidis

A man waves a flag as members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece, June 10, 2021. REUTERS/Louiza Vradi

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece, June 10, 2021. REUTERS/Louiza Vradi

Members of the Mexican Communist Party protest outside the Sofitel Hotel in rejection of the visit of U.S. Vice President Kamala Harris to Mexico City, Mexico June 8, 2021. REUTERS/Toya Sarno Jordan

Members of the Mexican Communist Party protest outside the Sofitel Hotel in rejection of the visit of U.S. Vice President Kamala Harris to Mexico City, Mexico June 8, 2021. REUTERS/Toya Sarno Jordan

Police officers stand guard, as members of the Mexican Communist Party protest outside the Sofitel Hotel in rejection of the visit of U.S. Vice President Kamala Harris to Mexico City, Mexico June 8, 2021. REUTERS/Toya Sarno Jordan

Members of the Mexican Communist Party protest outside the Sofitel Hotel in rejection of the visit of U.S. Vice President Kamala Harris to Mexico City, Mexico June 8, 2021. REUTERS/Toya Sarno Jordan

The former Chinese leader Deng Xiaoping is shown on a screen during an event marking the 100th founding anniversary of the Communist Party of China at the Memorial of the First National Congress of the Communist Party of China in Shanghai, China June 4, 2021. REUTERS/Aly Song

A woman takes picture for a Lenin's painting during an event marking the 100th founding anniversary of the Communist Party of China at the Memorial of the First National Congress of the Communist Party of China in Shanghai, China June 4, 2021. REUTERS/Aly Song

People recite the party oath in front of a screen shown Chinese President Xi Jinping during an event marking the 100th founding anniversary of the Communist Party of China at the Memorial of the First National Congress of the Communist Party of China in Shanghai, China June 4, 2021. REUTERS/Aly Song

People attend an event marking the 100th founding anniversary of the Communist Party of China at the Memorial of the First National Congress of the Communist Party of China in Shanghai, China June 4, 2021. REUTERS/Aly Song

Chinese President Xi Jinping is shown on a screen during an event marking the 100th founding anniversary of the Communist Party of China at the Memorial of the First National Congress of the Communist Party of China in Shanghai, China June 4, 2021. REUTERS/Aly Song TPX IMAGES OF THE DAY

A woman checks phone in front of a screen shown Chinese President Xi Jinping during an event marking the 100th founding anniversary of the Communist Party of China at the Memorial of the First National Congress of the Communist Party of China in Shanghai, China June 4, 2021. REUTERS/Aly Song

A woman poses for a picture during an event marking the 100th founding anniversary of the Communist Party of China at the Memorial of the First National Congress of the Communist Party of China in Shanghai, China June 4, 2021. REUTERS/Aly Song

People pass by photographs of Cuba's late President Fidel Castro and former President and First Secretary of the Communist Party Raul Castro, in Havana, Cuba, June 3, 2021. REUTERS/Alexandre Meneghini

Members of the communist-affiliated trade union PAME shout slogans during a demonstration against a planned labour bill, in Athens, Greece June 3, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME shout slogans during a demonstration against a planned labour bill, in Athens, Greece June 3, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME shout slogans during a demonstration against a planned labour bill, in Athens, Greece June 3, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME march in front of the parliament building during a demonstration against a planned labour bill, in Athens, Greece June 3, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece June 3, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME shout slogans during a demonstration against a planned labour bill, in Athens, Greece June 3, 2021. REUTERS/Costas Baltas

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece May 27, 2021. REUTERS/Alkis Konstantinidis

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece May 27, 2021. REUTERS/Alkis Konstantinidis

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece May 27, 2021. REUTERS/Alkis Konstantinidis

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece May 27, 2021. REUTERS/Alkis Konstantinidis

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece May 27, 2021. REUTERS/Alkis Konstantinidis

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece May 27, 2021. REUTERS/Alkis Konstantinidis

A man waves a flag as members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece May 27, 2021. REUTERS/Alkis Konstantinidis

Members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece May 27, 2021. REUTERS/Alkis Konstantinidis

A child looks on as members of the communist-affiliated trade union PAME take part in a demonstration against a planned labour bill, in Athens, Greece May 27, 2021. REUTERS/Alkis Konstantinidis

People walk to pay their respects in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People pay their respects in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People pay their respect in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People wait in line to pay their respect in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

A man holds a picture of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica

People pay their respect in front of the grave of the late Yugoslav Communist leader Josip Broz Tito at his mausoleum, "House of Flowers", during Tito's 129th birth anniversary in Belgrade, Serbia May 25, 2021. When ex-Yugoslavia communist leader Tito was alive, May 25 was celebrated as "Youth Day" and observed as a national holiday. REUTERS/Marko Djurica