Workers assemble tank cars at a factory in Lianyungang of east China's Jiangsu Province, April 16, 2018. China's GDP reached 19.88 trillion yuan (about 3.2 trillion U.S. dollars) in the first three months of 2018, up 6.8 percent year on year at comparable prices, according to the National Bureau of Statistics (NBS). (Xinhua/Si Wei)