What are the central mining companies in Chongqing?

Chongqing Bosai Mining (Group) Co., Ltd. and SDIC Chongqing Shale Gas Development and Utilization Co., Ltd. ... There are two central mining companies in Chongqing, namely Chongqing Bosai Mining (Group) Co., Ltd. and SDIC Chongqing Shale Gas Development and Utilization Co., Ltd. ... Chongqing, referred to as "Chongqing", also known as Mountain City. It is a provincial administrative region in People's Republic of China (PRC).