Photo taken on May 7, 2018 shows a tower crane loading cargoes on a freight train in Qingdao, east China's Shandong Province. China's gross domestic product expanded 6.8 percent year on year in the first half of 2018 to about 41.90 trillion yuan (6.27 trillion U.S. dollars), data from the National Bureau of Statistics (NBS) showed Monday. (Xinhua/Guo Xulei)