ICE high-speed trains are parked in a depot of German railway company Deutsche Bahn during a nationwide strike called by the German trade union Verdi over a wage dispute in Hamburg, Germany, March 27, 2023. REUTERS/Fabian Bimmer 

ICE high-speed trains are parked in a depot of German railway company Deutsche Bahn during a nationwide strike called by the German trade union Verdi over a wage dispute in Hamburg, Germany, March 27, 2023. REUTERS/Fabian Bimmer 

ICE high-speed trains are parked in a depot of German railway company Deutsche Bahn during a nationwide strike called by the German trade union Verdi over a wage dispute in Hamburg, Germany, March 27, 2023. REUTERS/Fabian Bimmer 

ICE high-speed trains are parked in a depot of German railway company Deutsche Bahn during a nationwide strike called by the German trade union Verdi over a wage dispute in Hamburg, Germany, March 27, 2023. REUTERS/Fabian Bimmer 

ICE high-speed trains are parked in a depot of German railway company Deutsche Bahn during a nationwide strike called by the German trade union Verdi over a wage dispute in Hamburg, Germany, March 27, 2023. REUTERS/Fabian Bimmer 

ICE high-speed trains are parked in a depot of German railway company Deutsche Bahn during a nationwide strike called by the German trade union Verdi over a wage dispute in Hamburg, Germany, March 27, 2023. REUTERS/Fabian Bimmer 

A puppet depicting French President Emmanuel Macron covered by Sud Solidaires labour union flags is installed on railway tracks by protesters to block a TGV high speed train during a demonstration at the train station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. REUTERS/Eric Gaillard 

Students walk on a railway tracks to block a TGV high speed train during a demonstration at the railway station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. The slogan reads "Angry youth". REUTERS/Eric Gaillard 

A worker on strike wearing a CGT labour union vest holds a flare as he stands on railway tracks to block a TGV high speed train during a demonstration at the train station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. REUTERS/Eric Gaillard 

A puppet depicting French President Emmanuel Macron covered by Sud Solidaires labour union flags is installed on railway tracks by protesters to block a TGV high speed train during a demonstration at the train station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. REUTERS/Eric Gaillard 

A puppet depicting French President Emmanuel Macron is installed on railway tracks by protesters to block a TGV high speed train during a demonstration at the train station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. REUTERS/Eric Gaillard 

A puppet depicting French President Emmanuel Macron is installed on railway tracks by protesters to block a TGV high speed train during a demonstration at the train station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. REUTERS/Eric Gaillard 

A puppet depicting French President Emmanuel Macron is installed on railway tracks by protesters to block a TGV high speed train during a demonstration at the train station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. REUTERS/Eric Gaillard TPX IMAGES OF THE DAY 

Workers on strike and students walk on railway tracks to block a TGV high speed train during a demonstration at the train station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. REUTERS/Eric Gaillard 

Students walk on railway tracks to block a TGV high speed train during a demonstration at the train station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. REUTERS/Eric Gaillard 

Workers on strike hold CGT labour union flags as they walk on railway tracks to block a TGV high speed train during a demonstration at the train station on the eve of the ninth day of national strike and protests, and after the pension reform was adopted as the French Parliament rejected two motions of no-confidence against the government, in Nice, France, March 22, 2023. REUTERS/Eric Gaillard 

TGV high speed trains are seen at a railway station, on the eve of a nationwide day of strike and protests against the pension reform in France with heavy disruption on French SNCF railway, in Nantes, France, March 6, 2023. REUTERS/Stephane Mahe 

TGV high speed trains are seen at a railway station, on the eve of a nationwide day of strike and protests against the pension reform in France with heavy disruption on French SNCF railway, in Nantes, France, March 6, 2023. REUTERS/Stephane Mahe 

TGV high speed trains are seen at a railway station, on the eve of a nationwide day of strike and protests against the pension reform in France with heavy disruption on French SNCF railway, in Nantes, France, March 6, 2023. REUTERS/Stephane Mahe 

A TGV InOui high-speed train is seen near Lille-Flandres train station during a strike by French SNCF railway workers in Lille as part of a nationwide day of strike and protests against French government's pension reform plan in France, February 7, 2023. REUTERS/Pascal Rossignol 

Passengers stand on a platform to board a TGV Ouigo high speed train at Gare Montparnasse train station during a strike by French SNCF railway workers in Paris as part of a nationwide day of strike and protests against French government's pension reform plan in France, January 31, 2023. REUTERS/Sarah Meyssonnier 

Passengers walk on a platform to board a TGV Ouigo high speed train at Gare Montparnasse train station during a strike by French SNCF railway workers in Paris as part of a nationwide day of strike and protests against French government's pension reform plan in France, January 31, 2023. REUTERS/Sarah Meyssonnier 

SNCF regional trains and a TGV high speed train are seen at a railway station in Nantes, on the eve of a nationwide day of strike and protests against the pension reform in France with heavy disruption on French SNCF railway, France, January 30, 2023. REUTERS/Stephane Mahe 

A TGV high speed train is seen at a railway station in Nantes, on the eve of a nationwide day of strike and protests against the pension reform in France with heavy disruption on French SNCF railway, France, January 30, 2023. REUTERS/Stephane Mahe 

A TGV high speed train is seen at a railway station in Nantes, on the eve of a nationwide day of strike and protests against the pension reform in France with heavy disruption on French SNCF railway, France, January 30, 2023. REUTERS/Stephane Mahe 

A passenger walks past a TGV Ouigo high speed train at Gare Montparnasse railway station during a strike by French SNCF workers in Paris as part of a nationwide day of strike and protests against French government's pension reform plan in France, January 19, 2023. REUTERS/Gonzalo Fuentes 

A man walks past a TGV Ouigo high speed train at Gare Montparnasse railway station during a strike by French SNCF workers in Paris as part of a nationwide day of strike and protests against French government's pension reform plan in France, January 19, 2023. REUTERS/Gonzalo Fuentes 

Passengers walks past a TGV high speed train at Gare Montparnasse railway station during a strike by French SNCF workers in Paris as part of a nationwide day of strike and protests against French government's pension reform plan in France, January 19, 2023. REUTERS/Gonzalo Fuentes 

Workers walk next to TGV trains (high speed train) parked at a SNCF depot station in Charenton-le-Pont near Paris as France's trade unions announced a nationwide day of strike and protests in key sectors like energy, public transport, air travel and schools against the pension reform, France, January 16, 2023. REUTERS/Gonzalo Fuentes 

A worker checks passengers tickets at West Kowloon High-Speed Train Station Terminus on the first day of the resumption of rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

A passenger dressed as train driver poses for a picture at West Kowloon High-Speed Train Station Terminus on the first day of the resumption of rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

Passengers queue up to get their tickets checked at West Kowloon High-Speed Train Station Terminus on the first day of the resumption of the rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

A passenger arrives at West Kowloon High-Speed Train Station Terminus on the first day of the resumption of rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

Passengers wait at West Kowloon High-Speed Train Station Terminus on the first day of the resumption of rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

Passengers arrive at West Kowloon High-Speed Train Station Terminus on the first day of the resumption of rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

Passengers arrive at West Kowloon High-Speed Train Station Terminus on the first day of the resumption of rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

Passengers arrive at West Kowloon High-Speed Train Station Terminus on the first day of the resumption of rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

Passengers arrive at West Kowloon High-Speed Train Station Terminus on the first day of the resumption of rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

A Chinese police officer stands guard at in the mainland port area of West Kowloon High-Speed Train Station Terminus on the first day of the resumption of rail service to mainland China, during the coronavirus disease (COVID-19) pandemic in Hong Kong, China, January 15, 2023. REUTERS/Tyrone Siu 

Travelers walk past a TGV high speed train at Lille-Flandres railway station in Lille during a strike by train guards at France's state-owned railway operator SNCF with major disruption for Christmas holidays in France, December 23, 2022. REUTERS/Pascal Rossignol 

Travelers walk past a TGV high speed train at Lille-Flandres railway station in Lille during a strike by train guards at France's state-owned railway operator SNCF with major disruption for Christmas holidays in France, December 23, 2022. REUTERS/Pascal Rossignol 

Travelers walk past a TGV high speed train at Lille-Flandres railway station in Lille during a strike by train guards at France's state-owned railway operator SNCF with major disruption for Christmas holidays in France, December 23, 2022. REUTERS/Pascal Rossignol 

Travelers walk on a platform to take a TGV high speed train at Gare Montparnasse railway station in Paris during a strike by train guards at France's state-owned railway operator SNCF with major disruption for Christmas holidays in France, December 23, 2022. REUTERS/Sarah Meyssonnier 

Travelers walk on a platform to take a TGV high speed train at Gare Montparnasse railway station in Paris during a strike by train guards at France's state-owned railway operator SNCF with major disruption for Christmas holidays in France, December 23, 2022. REUTERS/Sarah Meyssonnier 

Travelers walk on a platform to take a TGV high speed train at Gare Montparnasse railway station in Paris during a strike by train guards at France's state-owned railway operator SNCF with major disruption for Christmas holidays in France, December 23, 2022. REUTERS/Sarah Meyssonnier 

Travelers walk on a platform to take a TGV high speed train at Gare Montparnasse railway station in Paris during a strike by train guards at France's state-owned railway operator SNCF with major disruption for Christmas holidays in France, December 23, 2022. REUTERS/Sarah Meyssonnier 

Travelers walk on a platform to take a TGV high speed train at Gare Montparnasse railway station in Paris during a strike by train guards at France's state-owned railway operator SNCF with major disruption for Christmas holidays in France, December 23, 2022. REUTERS/Sarah Meyssonnier 

A TGV high speed train is seen on a platform at the Gare de l'Est train station in Paris on the eve of a strike by train guards at France's state-owned railway operator SNCF in France, December 22, 2022. REUTERS/Sarah Meyssonnier 

Travelers stand on a platform next to TGV high speed trains at the Gare de l'Est train station in Paris on the eve of a strike by train guards at France's state-owned railway operator SNCF in France, December 22, 2022. REUTERS/Sarah Meyssonnier 

A TGV high speed train arrives at the Gare de l'Est train station in Paris on the eve of a strike by train guards at France's state-owned railway operator SNCF in France, December 22, 2022. REUTERS/Sarah Meyssonnier 

Travelers walk on a platform to get on a TGV Ouigo high speed train at the Gare de l'Est train station in Paris on the eve of a strike by train guards at France's state-owned railway operator SNCF in France, December 22, 2022. REUTERS/Sarah Meyssonnier 

A TGV high speed train arrives at the Gare de l'Est train station in Paris on the eve of a strike by train guards at France's state-owned railway operator SNCF in France, December 22, 2022. REUTERS/Sarah Meyssonnier 

Travelers walk on a platform to get on a TGV Ouigo high speed train at the Gare de l'Est train station in Paris on the eve of a strike by train guards at France's state-owned railway operator SNCF in France, December 22, 2022. REUTERS/Sarah Meyssonnier 

Travelers walk on a platform to get on a TGV Ouigo high speed train at the Gare de l'Est train station in Paris on the eve of a strike by train guards at France's state-owned railway operator SNCF in France, December 22, 2022. REUTERS/Sarah Meyssonnier 

Travelers walk on a platform to get on a TGV Ouigo high speed train at the Gare de l'Est train station in Paris on the eve of a strike by train guards at France's state-owned railway operator SNCF in France, December 22, 2022. REUTERS/Sarah Meyssonnier 

Students sit in a model of a High Speed Rail train, at the InnoTech Expo in Hong Kong, China December 13, 2022. REUTERS/Tyrone Siu 

Students sit in a model of a High Speed Rail train, at the InnoTech Expo in Hong Kong, China December 13, 2022. REUTERS/Tyrone Siu 

A worker checks an Electric Multiple Unit high-speed train for a rail link project part of China's Belt and Road Initiative, at Tegalluar train depot in Bandung, West Java province, Indonesia, October 13, 2022. REUTERS/Yuddy Cahya Budiman 

An Electric Multiple Unit high-speed train for a rail link project part of China's Belt and Road Initiative is parked at Tegalluar train depot in Bandung, West Java province, Indonesia, October 13, 2022. REUTERS/Yuddy Cahya Budiman 

Workers stand beside an Electric Multiple Unit high-speed train for a rail link project part of China's Belt and Road Initiative, at Tegalluar train depot in Bandung, West Java province, Indonesia, October 13, 2022. REUTERS/Yuddy Cahya Budiman