Railway police and passengers react at a bullet train as they celebrate the Xiaonian Festival, the 23rd day of the last lunar month preluding the Spring Festival, Jan. 28, 2019. Xiaonian falls on the 23rd or 24th day of the last month of the Chinese traditional lunar calendar, marking the start of the countdown to Chinese lunar new year. (Xinhua/Zhang Yuan)

A train staff member plays the flute for passengers at a bullet train on Jan. 28, 2019, the day of Xiaonian Festival, the 23rd day of the last lunar month preluding the Spring Festival. Xiaonian falls on the 23rd or 24th day of the last month of the Chinese traditional lunar calendar, marking the start of the countdown to Chinese lunar new year. (Xinhua/Yang Qing)

A train staff member gives a poster of the Chinese character "Fu", which means good luck, to a passenger at a bullet train on Jan. 28, 2019, the day of Xiaonian Festival, the 23rd day of the last lunar month preluding the Spring Festival. Xiaonian falls on the 23rd or 24th day of the last month of the Chinese traditional lunar calendar, marking the start of the countdown to Chinese lunar new year. (Xinhua/Yang Qing)

A railway policewoman puts a red papercutting work on a window at a bullet train on Jan. 28, 2019, the day of Xiaonian Festival, the 23rd day of the last lunar month preluding the Spring Festival. Xiaonian falls on the 23rd or 24th day of the last month of the Chinese traditional lunar calendar, marking the start of the countdown to Chinese lunar new year. (Xinhua/Li Xin)