There can be a parent-subsidiary relationship between members of the construction consortium. The construction consortium is established to improve the cooperation efficiency and resource integration of the project. In some cases, due to the equity relationship, different construction companies may form a parent-subsidiary structure. But when it comes to bidding and contract signing, it is necessary to abide by the relevant anti-monopoly and fair competition laws and regulations. Specific specifications should be operated according to national or regional laws, and professionals should be consulted to ensure legal operation.