Policemen introduce safety knowledge to a passenger at the Chongqing North Railway Station in southwest China's Chongqing Municipality, Jan. 10, 2020. The upcoming holiday for the Spring Festival, a traditional festival for family reunions, will run from Jan. 24 to 30, while the travel rush, also known as chunyun, will last 40 days from Jan. 10 to Feb. 18. (Xinhua/Tang Yi)