FILE PHOTO: Workers are seen on the top of an iron ore pile as a machine works on blending the iron ore, at Dalian Port, Liaoning province, China September 21, 2018. Picture taken September 21, 2018. REUTERS/Muyu Xu
FILE PHOTO: Workers are seen on the top of an iron ore pile as a machine works on blending the iron ore, at Dalian Port, Liaoning province, China September 21, 2018. Picture taken September 21, 2018. REUTERS/Muyu Xu