云煤能源：公司主要从事焦炭及相关化工产品的生产及销售

Group 1 - The company, Yunmei Energy (600792), primarily engages in the production and sales of coke and related chemical products [1] - The main product of the company is metallurgical coke, while its by-products include gas, crude benzene, tar, methanol, ammonium sulfate, and sulfur [1]