The key focus of "harbor" integration lies in industrial integration.

The "harbor" integration focuses on industrial integration. It is proposed that the integration of "harbors" should shift from "initiating projects" and "attracting companies" to "building supply chains," jointly expanding new markets. For example, China's deep-sea resources are mainly located in Hainan, providing important conditions for the Guangdong-Hong Kong-Macao Greater Bay Area to expand its marine economy into the deep sea. It is suggested to collaborate in the development of ocean resources, realizing synergistic interaction between "Maritime Guangdong" and "Maritime Hainan." By combining "Guangdong technology + Hainan resources + Hong Kong and Macao services" and "Guangdong research and development + Hainan application + Hong Kong and Macao services," cooperation can be established in the development of marine ranches, marine new energy, marine biomedical resources, and other areas to expand the increment of the marine economy. Collaborate in the development of a pan-South China Sea cruise tourism route and products, develop the cruise industry in manufacturing, maintenance, talent training for cruise tourism, and promote tourism consumption in related industries. Build a "harbor" port alliance to promote port information sharing, joint construction of digital infrastructure, and joint operation, to jointly create a global shipping center.