龙建股份：公司坚持主责主业，在冰雪经济、旅游经济等领域内积极参与公路、市政等基础设施建设

Group 1 - The company, Longjian Co., Ltd. (stock code: 600853), emphasizes its commitment to its core business while diversifying into related areas [1] - The company is actively participating in infrastructure construction in sectors such as ice and snow economy and tourism economy [1]