SHIJIAZHUANG, July 15, 2016 (Xinhua) -- A worker inspects the warehouse of rolled steel coils at Handan Iron and Steel Group Co. Ltd in Handan, north China's Hebei Province, June 23, 2016. China's gross domestic product expanded 6.7 percent year on year in the second quarter of 2016, stable from the first quarter, the National Bureau of Statistics said on Friday. (Xinhua/Mu Yu)