Group 1 - The company primarily produces and sells coal products, including thermal coal, coking coal, 1/3 coking coal, fat coal, and anthracite [2] - The company encourages investors to refer to its main operating data and periodic reports for more detailed information [2] Group 2 - The inquiry was made by an investor on an interactive platform regarding the types of coal products and their characteristics [2] - The company responded to the inquiry on August 12, indicating the variety of coal products it offers [2]