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)