Passengers board a train at Dingxi North Railway Station in Dingxi City, northwest China's Gansu Province, May 3, 2023. China is bracing for a fresh travel peak as a growing number of travelers hit the road and returned to work as the five-day May Day holiday drew to an end on Wednesday. (Photo by Wang Kexian/Xinhua)

Passengers walk on the platform at Yantai Railway Station in Yantai, east China's Shandong Province, May 3, 2023. China is bracing for a fresh travel peak as a growing number of travelers hit the road and returned to work as the five-day May Day holiday drew to an end on Wednesday. (Photo by Sun Wentan/Xinhua)

This photo taken on May 3, 2023 shows passengers in the waiting hall of Shanghai Hongqiao Railway Station in Shanghai, east China. China is bracing for a fresh travel peak as a growing number of travelers hit the road and returned to work as the five-day May Day holiday drew to an end on Wednesday. (Xinhua/Wang Xiang)

Passengers walk on the platform at Nanjing Railway Station in Nanjing, east China's Jiangsu Province, May 3, 2023. China is bracing for a fresh travel peak as a growing number of travelers hit the road and returned to work as the five-day May Day holiday drew to an end on Wednesday. (Photo by Su Yang/Xinhua)