FILE PHOTO: A worker stands outside a factory of Contemporary Amperex Technology Ltd (CATL) in Ningde, Fujian province, China, December 16, 2016. Picture taken December 16, 2016. REUTERS/Jake Spring
FILE PHOTO: A worker stands outside a factory of Contemporary Amperex Technology Ltd (CATL) in Ningde, Fujian province, China, December 16, 2016. Picture taken December 16, 2016. REUTERS/Jake Spring