FILE PHOTO: An employee walks at a engine factory of CSSC Wartsila Engine (Shanghai) Co. Ltd in Shanghai, China June 13, 2017. Picture taken June 13, 2017. REUTERS/Aly Song/File Photo
FILE PHOTO: An employee walks at a engine factory of CSSC Wartsila Engine (Shanghai) Co. Ltd in Shanghai, China June 13, 2017. Picture taken June 13, 2017. REUTERS/Aly Song/File Photo