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Passengers board a train at Tianjin Railway Station in north China's Tianjin, May 1, 2019. China's railway system saw a rise in passenger numbers as the four-day Labor Day national holiday began on May 1. (Xinhua/Yang Baosen)
Passengers board a train at Tianjin Railway Station in north China's Tianjin, May 1, 2019. China's railway system saw a rise in passenger numbers as the four-day Labor Day national holiday began on May 1. (Xinhua/Yang Baosen)