FAP, 19 Apr (Xinhua)-- this year's May Day holiday will last from April 29 to May 3, a total of five days. Tickets for April 29th went on sale on April 15th. On the return trip, passengers can buy train tickets on May 3 through China Train 12306's website and railway 12306APP from April 19. Passenger trains departing from Beijing to Shanghai, Wuhan, Nanjing and Xi'an have basically sold out on April 29, and there are few tickets left on the above lines on April 30, according to the official website of 12306. A person in charge of Ctrip train tickets said that high-speed rail is a more economical and convenient way for series tours and theme tours, as users' enthusiasm for May Day travel continues to grow, as well as the layout and opening of special tourism trains with special features in many places. the upcoming May Day holiday may usher in the busiest high-speed rail trip in recent years.