首华燃气：公司的主营业务为天然气业务

Core Viewpoint - The company, Shouhua Gas, primarily engages in natural gas business, focusing on exploration, development, production, transmission, and sales of natural gas [1]. Company Overview - Shouhua Gas is involved in various aspects of the natural gas industry, including exploration, development, production, and sales [1]. - The company also provides transmission and boosting services for natural gas [1].