The Yichun Luming mine is a Chinese molybdenum mine located 60 kilometres (37 mi) south-west of the city of Yichun in Heilongjiang province. The mine is operated by Yichun Luming Mining Company, a subsidiary of China Railway Group. It is the largest open-pit mine in China.[1] On 28 March 2020, the mine had a significant tailings release from its storage facility of 2.53 million cubic metres of polluted water.[2] The Chinese government has launched an investigation into the incident.[3]