China Coal Beijing Coal Mining Machinery Co., Ltd. (abbr as "BMJ"), established in October 1958, is a subsidiary of China National Coal Group Corporation. In 2006, it became part of its parent company's dual listing on the A+H share markets. BMJ developed China's first BZZB chock shield hydraulic support in 1970 and achieving mass production in 1972. After decades of innovation and development, the company has become a leading integrated solution provider for underground coal mining equipment in China. It is capable of designing and manufacturing more than 1000 models of hydraulic supports in various specifications, with height ranging from 0.55 meters to 10 meters, working resistance from 1800kN to 29000kN, and center distance from 1.25 meters to 2.4 meters. The company's products serve all major coal-producing regions across China and have been successfully exported to key coal-producing countries worldwide, including Russia, Australia, Belarus, India, Kazakhstan, Bangladesh, Vietnam, and the United States. BMJ has made significant contributions to the localization of China's coal mining equipment and the modernization of the coal industry from manual and semi-mechanized to fully mechanized and the realization of mining operation with "Safe, Green, Clean, Efficient" goals. BMJ covers an area of over 133 ha, with 5 key subsidiary enterprises, more than 3000 employees, and total assets 8887 million Yuan.