中化岩土：关于全资子公司收到中标通知书的公告

Group 1 - The core point of the article is that Zhonghua Rock and Soil has announced that its wholly-owned subsidiary, Beijing Changdao Municipal Engineering Group Co., Ltd., has received a bid notification for the flight area infrastructure maintenance framework project from Shanghai Airport (Group) Co., Ltd. [1] Group 2 - The announcement highlights the successful bid for the maintenance of ancillary facilities, indicating a significant opportunity for the company in the municipal engineering sector [1] - This project may enhance the company's portfolio and strengthen its position in the infrastructure maintenance market [1] - The collaboration with a major entity like Shanghai Airport suggests potential for future projects and partnerships in the industry [1]