龙建股份：中标4.83亿元公路养护工程施工项目

Group 1 - The core point of the article is that Longjian Co., Ltd. has won a bid for a highway maintenance project in Heilongjiang Province, with a contract value of 483 million yuan and a planned duration of 365 days [1] Group 2 - Longjian Co., Ltd.'s wholly-owned subsidiary, Heilongjiang Longjian Road and Bridge Second Engineering Co., Ltd., formed a consortium with Heilongjiang Longjian Road and Bridge Third Engineering Co., Ltd. to secure the project [1] - The project is part of the 2025 maintenance engineering for ordinary national and provincial highways in Heilongjiang Province [1]