A train is seen at Gare Lille Flandres in Lille, northern France, on Dec 23, 2022. Photo:Xinhua

A train enters Gare Saint Lazare train station in Paris, France, Dec 23, 2022. Photo:Xinhua

A train is seen at Gare Lille Flandres in Lille, northern France, on Dec 23, 2022. Photo:Xinhua

A conductor is seen at Gare Lille Flandres in Lille, northern France, on Dec 23, 2022. Photo:Xinhua

A conductor is seen at Gare Lille Flandres in Lille, northern France, on Dec 23, 2022. Photo:Xinhua

Passengers look at the information panels at Gare Saint Lazare train station in Paris, France, Dec 23, 2022. Photo:Xinhua

Passengers are seen at Gare Saint Lazare train station in Paris, France, Dec 23, 2022. Photo:Xinhua

Passengers walk on the platform at Gare Saint Lazare train station in Paris, France, Dec 23, 2022. Photo:Xinhua