Authorities are expecting 19 million trips to be made across China's vast railway network on Saturday, the first day of the five-day holiday, which would be the highest number of rail trips made in a single day in the country's history. It compares to 4.4 million rail trips on May 1 last year, when China locked down several cities including Shanghai to battle the spread of the virus, and the last peak of 18.8 million on the same day in 2021.