中国交建：公司在海南设有多家下属子公司及项目公司

Group 1 - The company has multiple subsidiaries and project companies in Hainan, covering infrastructure construction, cultural tourism development, and marine engineering [2] - These local operations provide support for the company's projects in ports, highways, cultural tourism, and marine economy in Hainan [2] - The company plans to continue leveraging its local subsidiaries to deepen its market presence in Hainan [2]