People work on a production line of CRRC Tangshan Co., Ltd. in Tangshan, north China's Hebei Province, Dec. 31, 2019. China's economy grew 6.1 percent year on year in 2019, within the government's annual target of 6 to 6.5 percent, the National Bureau of Statistics (NBS) said on Friday. (Xinhua/Yang Shiyao)