吉林高速：公司的主营业务为收费公路的投资、开发、建设和经营管理

Group 1 - The company is registered in Changchun City, Jilin Province, and operates the Changchun to Siping Expressway and the Changchun Western Ring Expressway [2] - The main business of the company includes investment, development, construction, and management of toll roads [2] - The company currently has no overseas sales operations [2]