Photo taken on April 13, 2018 shows a container wharf in the harbour of Lianyungang, east China's Jiangsu Province. 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/Geng Yuhe)