Passengers inquire information at the service desk of Xuzhou East Railway Station in Xuzhou, east China's Jiangsu Province, on April 30, 2024. China's railway network is expected to handle 144 million passenger trips during the eight-day May Day holiday travel rush, the China State Railway Group Co., Ltd. said Monday. (Xinhua/Mao Jun)

Passengers queue to check their tickets at Xuzhou East Railway Station in Xuzhou, east China's Jiangsu Province, on April 30, 2024. China's railway network is expected to handle 144 million passenger trips during the eight-day May Day holiday travel rush, the China State Railway Group Co., Ltd. said Monday. (Xinhua/Mao Jun)

Passengers inquire information at the service desk of Jinhua Railway Station in Jinhua, east China's Zhejiang Province, on April 30, 2024. China's railway network is expected to handle 144 million passenger trips during the eight-day May Day holiday travel rush, the China State Railway Group Co., Ltd. said Monday. (Photo by Hu Xiaofei/Xinhua)

Passengers queue to enter Harbin Railway Station in Harbin, capital of northeast China's Heilongjiang Province, on April 30, 2024. China's railway network is expected to handle 144 million passenger trips during the eight-day May Day holiday travel rush, the China State Railway Group Co., Ltd. said Monday. (Photo by Yuan Yong/Xinhua)

Passengers are seen at the platform of Harbin Railway Station in Harbin, capital of northeast China's Heilongjiang Province, on April 30, 2024. China's railway network is expected to handle 144 million passenger trips during the eight-day May Day holiday travel rush, the China State Railway Group Co., Ltd. said Monday. (Photo by Yuan Yong/Xinhua)

Passengers board a train at Nanjing Railway Station in Nanjing, capital of east China's Jiangsu Province, on April 30, 2024. China's railway network is expected to handle 144 million passenger trips during the eight-day May Day holiday travel rush, the China State Railway Group Co., Ltd. said Monday. (Photo by Su Yang/Xinhua)

A passenger inquires information at the service desk of Zhengzhou East Railway Station in Zhouzheng, central China's Henan Province, on April 30, 2024. China's railway network is expected to handle 144 million passenger trips during the eight-day May Day holiday travel rush, the China State Railway Group Co., Ltd. said Monday. (Xinhua/Hao Yuan)

A staff member of Harbin Railway Station guides passengers to enter the station in Harbin, capital of northeast China's Heilongjiang Province, on April 30, 2024. China's railway network is expected to handle 144 million passenger trips during the eight-day May Day holiday travel rush, the China State Railway Group Co., Ltd. said Monday. (Photo by Yuan Yong/Xinhua)

Passengers are seen at the waiting hall of Zhengzhou East Railway Station in Zhouzheng, central China's Henan Province, on April 30, 2024. China's railway network is expected to handle 144 million passenger trips during the eight-day May Day holiday travel rush, the China State Railway Group Co., Ltd. said Monday.