Cargo vessels enter the five-tier ship lock at the Three Gorges Dam on the Yangtze River, April 6, 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/Zheng Jiayu)