Policemen volunteer to donate blood for the injured of a mine accident at the blood bank of Xilingol League in north China's Inner Mongolia Autonomous Region, Feb. 24, 2019. A total of 21 people have been killed and 29 others injured after a vehicle lost control due to faulty brakes Saturday at a mining company in northern China's Inner Mongolia Autonomous Region, local authorities said Sunday morning. (Xinhua/Liu Yide)