FILE PHOTO: A general view shows Pinggang coal mine from the state-owned Longmay Group on the outskirts of Jixi, in Heilongjiang province, China, October 24, 2015. REUTERS/Jason Lee
FILE PHOTO: A general view shows Pinggang coal mine from the state-owned Longmay Group on the outskirts of Jixi, in Heilongjiang province, China, October 24, 2015. REUTERS/Jason Lee