Constructors who took part in the construction of the Jinan-Qingdao high speed railway pose for photo in front of a train in Jinan East Railway Station, east China's Shandong Province, Dec. 26, 2018. The Jinan-Qingdao high speed railway which started operation on Wednesday will shorten the travel time between the two cities from 140 minutes to 100 minutes. (Xinhua/Guo Xulei)