Group 1 - The State Intellectual Property Office of China has published a patent application by China Coal Technology & Engineering Group Mining Research Institute Co., Ltd. and Tiandi Technology Co., Ltd. for a "Complex Coal Seam Top Coal Caving Mining Coal Flow Monitoring Device and Coal Seam Mining Transportation System" [1] - The patent includes a coal flow monitoring device that consists of a supporting device, a stabilizing device, and a coal flow monitoring instrument, designed to enhance the efficiency and safety of coal mining operations [1] - The supporting device features a foldable and expandable structure with optimized rigidity through link components and elastic elements, while the stabilizing device ensures omnidirectional stability during operation [1] Group 2 - China Coal Technology & Engineering Group Mining Research Institute Co., Ltd. was established in 2020, located in Beijing, with a registered capital of 50 million RMB, focusing on research and experimental development [2] - The company has made investments in 3 enterprises, participated in 747 bidding projects, and holds 1,607 patent records, along with 10 administrative licenses [2] - Tiandi Technology Co., Ltd. was founded in 2000, also based in Beijing, with a registered capital of approximately 4.14 billion RMB, primarily engaged in technology promotion and application services [2] - Tiandi Technology has invested in 29 enterprises, participated in 1,818 bidding projects, and possesses 33 trademark records and 1,767 patent records, along with 17 administrative licenses [2]