Apr. 2, 2017 (Xinhua) -- China will see a surge of rail travelers during the Tomb-sweeping Day holiday. China Railway, the national railway operator, expects the number of trips in the country to hit 45.2 million over the four-day travel rush, a 9.5 percent increase year on year. The travel peak is expected on Sunday when train trips could reach 12.8 million, up 10.1 percent year on year.